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<a href="checkpt__timer_8cpp.html">Go to the documentation of this file.</a><div class="fragment"><div class="line"><a id="l00001" name="l00001"></a><span class="lineno">    1</span><span class="comment">/* Flow</span></div>
<div class="line"><a id="l00002" name="l00002"></a><span class="lineno">    2</span><span class="comment"> * Copyright 2023 Akamai Technologies, Inc.</span></div>
<div class="line"><a id="l00003" name="l00003"></a><span class="lineno">    3</span><span class="comment"> *</span></div>
<div class="line"><a id="l00004" name="l00004"></a><span class="lineno">    4</span><span class="comment"> * Licensed under the Apache License, Version 2.0 (the</span></div>
<div class="line"><a id="l00005" name="l00005"></a><span class="lineno">    5</span><span class="comment"> * &quot;License&quot;); you may not use this file except in</span></div>
<div class="line"><a id="l00006" name="l00006"></a><span class="lineno">    6</span><span class="comment"> * compliance with the License.  You may obtain a copy</span></div>
<div class="line"><a id="l00007" name="l00007"></a><span class="lineno">    7</span><span class="comment"> * of the License at</span></div>
<div class="line"><a id="l00008" name="l00008"></a><span class="lineno">    8</span><span class="comment"> *</span></div>
<div class="line"><a id="l00009" name="l00009"></a><span class="lineno">    9</span><span class="comment"> *   https://www.apache.org/licenses/LICENSE-2.0</span></div>
<div class="line"><a id="l00010" name="l00010"></a><span class="lineno">   10</span><span class="comment"> *</span></div>
<div class="line"><a id="l00011" name="l00011"></a><span class="lineno">   11</span><span class="comment"> * Unless required by applicable law or agreed to in</span></div>
<div class="line"><a id="l00012" name="l00012"></a><span class="lineno">   12</span><span class="comment"> * writing, software distributed under the License is</span></div>
<div class="line"><a id="l00013" name="l00013"></a><span class="lineno">   13</span><span class="comment"> * distributed on an &quot;AS IS&quot; BASIS, WITHOUT WARRANTIES OR</span></div>
<div class="line"><a id="l00014" name="l00014"></a><span class="lineno">   14</span><span class="comment"> * CONDITIONS OF ANY KIND, either express or implied.</span></div>
<div class="line"><a id="l00015" name="l00015"></a><span class="lineno">   15</span><span class="comment"> * See the License for the specific language governing</span></div>
<div class="line"><a id="l00016" name="l00016"></a><span class="lineno">   16</span><span class="comment"> * permissions and limitations under the License. */</span></div>
<div class="line"><a id="l00017" name="l00017"></a><span class="lineno">   17</span><span class="comment"></span> </div>
<div class="line"><a id="l00018" name="l00018"></a><span class="lineno">   18</span><span class="comment">/// @file</span></div>
<div class="line"><a id="l00019" name="l00019"></a><span class="lineno">   19</span><span class="comment"></span><span class="preprocessor">#include &quot;<a class="code" href="checkpt__timer_8hpp.html">flow/perf/checkpt_timer.hpp</a>&quot;</span></div>
<div class="line"><a id="l00020" name="l00020"></a><span class="lineno">   20</span><span class="preprocessor">#include &lt;boost/algorithm/string.hpp&gt;</span></div>
<div class="line"><a id="l00021" name="l00021"></a><span class="lineno">   21</span><span class="preprocessor">#include &lt;time.h&gt;</span></div>
<div class="line"><a id="l00022" name="l00022"></a><span class="lineno">   22</span><span class="preprocessor">#include &lt;utility&gt;</span></div>
<div class="line"><a id="l00023" name="l00023"></a><span class="lineno">   23</span> </div>
<div class="line"><a id="l00024" name="l00024"></a><span class="lineno"><a class="line" href="namespaceflow_1_1perf.html">   24</a></span><span class="keyword">namespace </span><a class="code hl_namespace" href="namespaceflow_1_1perf.html">flow::perf</a></div>
<div class="line"><a id="l00025" name="l00025"></a><span class="lineno">   25</span>{</div>
<div class="line"><a id="l00026" name="l00026"></a><span class="lineno">   26</span> </div>
<div class="line"><a id="l00027" name="l00027"></a><span class="lineno">   27</span><span class="comment">// Checkpointing_timer::Aggregator implementations.</span></div>
<div class="line"><a id="l00028" name="l00028"></a><span class="lineno">   28</span> </div>
<div class="line"><a id="l00029" name="l00029"></a><span class="lineno"><a class="line" href="classflow_1_1perf_1_1Checkpointing__timer.html#aa9940d8e87883f9985ba18939f833db9">   29</a></span><a class="code hl_function" href="classflow_1_1perf_1_1Checkpointing__timer.html#aa9940d8e87883f9985ba18939f833db9">Checkpointing_timer::Checkpointing_timer</a>(<a class="code hl_class" href="classflow_1_1log_1_1Logger.html">log::Logger</a>* logger_ptr,</div>
<div class="line"><a id="l00030" name="l00030"></a><span class="lineno">   30</span>                                         std::string&amp;&amp; name_moved, <a class="code hl_typedef" href="namespaceflow_1_1perf.html#aabd93a8a40158585ed149742d8937601">Clock_types_subset</a> which_clocks,</div>
<div class="line"><a id="l00031" name="l00031"></a><span class="lineno">   31</span>                                         <span class="keywordtype">size_t</span> max_n_checkpoints) :</div>
<div class="line"><a id="l00032" name="l00032"></a><span class="lineno">   32</span>  log::Log_context(logger_ptr, <a class="code hl_enumeration" href="namespaceflow.html#a3938730ab4b89daf13d027a5f620e7ce">Flow_log_component</a>::S_PERF),</div>
<div class="line"><a id="l00033" name="l00033"></a><span class="lineno">   33</span>  m_name(std::move(name_moved)),</div>
<div class="line"><a id="l00034" name="l00034"></a><span class="lineno">   34</span>  m_which_clocks(which_clocks)</div>
<div class="line"><a id="l00035" name="l00035"></a><span class="lineno">   35</span>  <span class="comment">// m_start_when and m_last_checkpoint_when are currently garbage.</span></div>
<div class="line"><a id="l00036" name="l00036"></a><span class="lineno">   36</span>{</div>
<div class="line"><a id="l00037" name="l00037"></a><span class="lineno">   37</span>  <span class="keyword">using </span><a class="code hl_function" href="namespaceflow_1_1util.html#a685b86585da2fa5186f51854e7ae1561">flow::util::ostream_op_string</a>;</div>
<div class="line"><a id="l00038" name="l00038"></a><span class="lineno">   38</span>  <span class="keyword">using </span>boost::algorithm::join;</div>
<div class="line"><a id="l00039" name="l00039"></a><span class="lineno">   39</span>  <span class="keyword">using </span>std::vector;</div>
<div class="line"><a id="l00040" name="l00040"></a><span class="lineno">   40</span>  <span class="keyword">using </span>std::string;</div>
<div class="line"><a id="l00041" name="l00041"></a><span class="lineno">   41</span> </div>
<div class="line"><a id="l00042" name="l00042"></a><span class="lineno">   42</span>  assert(max_n_checkpoints != 0);</div>
<div class="line"><a id="l00043" name="l00043"></a><span class="lineno">   43</span> </div>
<div class="line"><a id="l00044" name="l00044"></a><span class="lineno">   44</span>  <a class="code hl_variable" href="classflow_1_1perf_1_1Checkpointing__timer.html#a9d064df3b46dd7e629f4d836a9803750">m_checkpoints</a>.reserve(max_n_checkpoints); <span class="comment">// Performance -- avoid reallocs.</span></div>
<div class="line"><a id="l00045" name="l00045"></a><span class="lineno">   45</span> </div>
<div class="line"><a id="l00046" name="l00046"></a><span class="lineno">   46</span>  <span class="keywordflow">if</span> (logger_ptr &amp;&amp; logger_ptr-&gt;<a class="code hl_function" href="classflow_1_1log_1_1Logger.html#ac8a2e7a33fe3fbc0c29ead62ed98c022">should_log</a>(<a class="code hl_enumvalue" href="namespaceflow_1_1log.html#a5c602384e6fe9d7642740ac2fae4ad04a3ee808b04c34bf6c110e3754de277f7b">log::Sev::S_TRACE</a>, <a class="code hl_function" href="classflow_1_1log_1_1Log__context.html#a8a5fef42dc2cedf3c0d1a6e83beb2948">get_log_component</a>()))</div>
<div class="line"><a id="l00047" name="l00047"></a><span class="lineno">   47</span>  {</div>
<div class="line"><a id="l00048" name="l00048"></a><span class="lineno">   48</span>    vector&lt;string&gt; active_clock_type_strs;</div>
<div class="line"><a id="l00049" name="l00049"></a><span class="lineno">   49</span>    active_clock_type_strs.reserve(<a class="code hl_variable" href="classflow_1_1perf_1_1Checkpointing__timer.html#ac5518c3fdc58f8867ca114186562575b">m_which_clocks</a>.size()); <span class="comment">// Overboard but whatever....</span></div>
<div class="line"><a id="l00050" name="l00050"></a><span class="lineno">   50</span>    <span class="keywordflow">for</span> (<span class="keywordtype">size_t</span> clock_type_idx = 0; clock_type_idx != <a class="code hl_variable" href="classflow_1_1perf_1_1Checkpointing__timer.html#ac5518c3fdc58f8867ca114186562575b">m_which_clocks</a>.size(); ++clock_type_idx)</div>
<div class="line"><a id="l00051" name="l00051"></a><span class="lineno">   51</span>    {</div>
<div class="line"><a id="l00052" name="l00052"></a><span class="lineno">   52</span>      <span class="keywordflow">if</span> (<a class="code hl_variable" href="classflow_1_1perf_1_1Checkpointing__timer.html#ac5518c3fdc58f8867ca114186562575b">m_which_clocks</a>[clock_type_idx])</div>
<div class="line"><a id="l00053" name="l00053"></a><span class="lineno">   53</span>      {</div>
<div class="line"><a id="l00054" name="l00054"></a><span class="lineno">   54</span>        active_clock_type_strs.emplace_back(<a class="code hl_function" href="namespaceflow_1_1util.html#a685b86585da2fa5186f51854e7ae1561">ostream_op_string</a>(<a class="code hl_enumeration" href="namespaceflow_1_1perf.html#ad61fb186191e4bb824d14601d11a2eb0">Clock_type</a>(clock_type_idx)));</div>
<div class="line"><a id="l00055" name="l00055"></a><span class="lineno">   55</span>      }</div>
<div class="line"><a id="l00056" name="l00056"></a><span class="lineno">   56</span>    }</div>
<div class="line"><a id="l00057" name="l00057"></a><span class="lineno">   57</span> </div>
<div class="line"><a id="l00058" name="l00058"></a><span class="lineno">   58</span>    <a class="code hl_define" href="log_8hpp.html#a6b3b2cd7ddabf90a7c6ccd104a042cc6">FLOW_LOG_TRACE_WITHOUT_CHECKING</a>(<span class="stringliteral">&quot;Timer [&quot;</span> &lt;&lt; <a class="code hl_variable" href="classflow_1_1perf_1_1Checkpointing__timer.html#a25981d44a91e1315bd92711d6e18a91b">m_name</a> &lt;&lt; <span class="stringliteral">&quot;] created; &quot;</span></div>
<div class="line"><a id="l00059" name="l00059"></a><span class="lineno">   59</span>                                    <span class="stringliteral">&quot;active clock types = [&quot;</span> &lt;&lt; join(active_clock_type_strs, <span class="stringliteral">&quot; | &quot;</span>) &lt;&lt; <span class="stringliteral">&quot;].&quot;</span>);</div>
<div class="line"><a id="l00060" name="l00060"></a><span class="lineno">   60</span>  }</div>
<div class="line"><a id="l00061" name="l00061"></a><span class="lineno">   61</span> </div>
<div class="line"><a id="l00062" name="l00062"></a><span class="lineno">   62</span>  <span class="comment">// Start timing at the last moment: as close to the start of the user&#39;s measured op as possible.</span></div>
<div class="line"><a id="l00063" name="l00063"></a><span class="lineno">   63</span>  <a class="code hl_variable" href="classflow_1_1perf_1_1Checkpointing__timer.html#ac16b16c3192e287ae3f08be786626f1a">m_start_when</a> = <a class="code hl_variable" href="classflow_1_1perf_1_1Checkpointing__timer.html#a66605dd59939ddc69d7f8fde19a5ed7c">m_last_checkpoint_when</a> = <a class="code hl_function" href="classflow_1_1perf_1_1Checkpointing__timer.html#a3b73f2812c2bf6a27ef2becc13859d73">now</a>();</div>
<div class="line"><a id="l00064" name="l00064"></a><span class="lineno">   64</span>}</div>
<div class="line"><a id="l00065" name="l00065"></a><span class="lineno">   65</span> </div>
<div class="line"><a id="l00066" name="l00066"></a><span class="lineno"><a class="line" href="classflow_1_1perf_1_1Checkpointing__timer.html#a3f66ac1b66f1394f2033fd4b0002062b">   66</a></span><a class="code hl_function" href="classflow_1_1perf_1_1Checkpointing__timer.html#aa9940d8e87883f9985ba18939f833db9">Checkpointing_timer::Checkpointing_timer</a>(<a class="code hl_class" href="classflow_1_1log_1_1Logger.html">log::Logger</a>* logger_ptr,</div>
<div class="line"><a id="l00067" name="l00067"></a><span class="lineno">   67</span>                                         std::string&amp;&amp; name_moved, <a class="code hl_typedef" href="namespaceflow_1_1perf.html#aabd93a8a40158585ed149742d8937601">Clock_types_subset</a> which_clocks) :</div>
<div class="line"><a id="l00068" name="l00068"></a><span class="lineno">   68</span>  <span class="comment">// (Reminder: This ctor is used for the Aggregator path (non-public).)  Initialize everything const; nothing else.</span></div>
<div class="line"><a id="l00069" name="l00069"></a><span class="lineno">   69</span>  log::Log_context(logger_ptr, <a class="code hl_enumeration" href="namespaceflow.html#a3938730ab4b89daf13d027a5f620e7ce">Flow_log_component</a>::S_PERF),</div>
<div class="line"><a id="l00070" name="l00070"></a><span class="lineno">   70</span>  m_name(std::move(name_moved)),</div>
<div class="line"><a id="l00071" name="l00071"></a><span class="lineno">   71</span>  m_which_clocks(which_clocks)</div>
<div class="line"><a id="l00072" name="l00072"></a><span class="lineno">   72</span>  <span class="comment">// m_start_when and m_last_checkpoint_when are currently garbage.  m_checkpoints is not pre-reserved.</span></div>
<div class="line"><a id="l00073" name="l00073"></a><span class="lineno">   73</span>{</div>
<div class="line"><a id="l00074" name="l00074"></a><span class="lineno">   74</span>  <span class="comment">// That&#39;s it.</span></div>
<div class="line"><a id="l00075" name="l00075"></a><span class="lineno">   75</span>}</div>
<div class="line"><a id="l00076" name="l00076"></a><span class="lineno">   76</span> </div>
<div class="line"><a id="l00077" name="l00077"></a><span class="lineno"><a class="line" href="classflow_1_1perf_1_1Checkpointing__timer.html#a959a0446aa6a0b6db59e9892d8f0a699">   77</a></span><a class="code hl_typedef" href="namespaceflow_1_1perf.html#aabd93a8a40158585ed149742d8937601">Clock_types_subset</a> <a class="code hl_function" href="classflow_1_1perf_1_1Checkpointing__timer.html#a959a0446aa6a0b6db59e9892d8f0a699">Checkpointing_timer::real_clock_types</a>() <span class="comment">// Static.</span></div>
<div class="line"><a id="l00078" name="l00078"></a><span class="lineno">   78</span>{</div>
<div class="line"><a id="l00079" name="l00079"></a><span class="lineno">   79</span>  <a class="code hl_typedef" href="namespaceflow_1_1perf.html#aabd93a8a40158585ed149742d8937601">Clock_types_subset</a> clocks;</div>
<div class="line"><a id="l00080" name="l00080"></a><span class="lineno">   80</span>  clocks.set(<span class="keywordtype">size_t</span>(<a class="code hl_enumvalue" href="namespaceflow_1_1perf.html#ad61fb186191e4bb824d14601d11a2eb0a8cbf506eda585c026dfb5b72c402d342">Clock_type::S_REAL_HI_RES</a>));</div>
<div class="line"><a id="l00081" name="l00081"></a><span class="lineno">   81</span>  <span class="keywordflow">return</span> clocks;</div>
<div class="line"><a id="l00082" name="l00082"></a><span class="lineno">   82</span>}</div>
<div class="line"><a id="l00083" name="l00083"></a><span class="lineno">   83</span> </div>
<div class="line"><a id="l00084" name="l00084"></a><span class="lineno"><a class="line" href="classflow_1_1perf_1_1Checkpointing__timer.html#a32ed9864d46708789d7418ab637ff382">   84</a></span><a class="code hl_typedef" href="namespaceflow_1_1perf.html#aabd93a8a40158585ed149742d8937601">Clock_types_subset</a> <a class="code hl_function" href="classflow_1_1perf_1_1Checkpointing__timer.html#a32ed9864d46708789d7418ab637ff382">Checkpointing_timer::process_cpu_clock_types</a>() <span class="comment">// Static.</span></div>
<div class="line"><a id="l00085" name="l00085"></a><span class="lineno">   85</span>{</div>
<div class="line"><a id="l00086" name="l00086"></a><span class="lineno">   86</span>  <a class="code hl_typedef" href="namespaceflow_1_1perf.html#aabd93a8a40158585ed149742d8937601">Clock_types_subset</a> clocks;</div>
<div class="line"><a id="l00087" name="l00087"></a><span class="lineno">   87</span>  clocks.set(<span class="keywordtype">size_t</span>(<a class="code hl_enumvalue" href="namespaceflow_1_1perf.html#ad61fb186191e4bb824d14601d11a2eb0ae06b569eb44aff6a567186f4eddb12ed">Clock_type::S_CPU_USER_LO_RES</a>));</div>
<div class="line"><a id="l00088" name="l00088"></a><span class="lineno">   88</span>  clocks.set(<span class="keywordtype">size_t</span>(<a class="code hl_enumvalue" href="namespaceflow_1_1perf.html#ad61fb186191e4bb824d14601d11a2eb0a1490431155a134162390180995550ca7">Clock_type::S_CPU_SYS_LO_RES</a>));</div>
<div class="line"><a id="l00089" name="l00089"></a><span class="lineno">   89</span>  clocks.set(<span class="keywordtype">size_t</span>(<a class="code hl_enumvalue" href="namespaceflow_1_1perf.html#ad61fb186191e4bb824d14601d11a2eb0ac5c54159101dbdb580f0b16a9397d6f3">Clock_type::S_CPU_TOTAL_HI_RES</a>));</div>
<div class="line"><a id="l00090" name="l00090"></a><span class="lineno">   90</span>  <span class="keywordflow">return</span> clocks;</div>
<div class="line"><a id="l00091" name="l00091"></a><span class="lineno">   91</span>}</div>
<div class="line"><a id="l00092" name="l00092"></a><span class="lineno">   92</span> </div>
<div class="line"><a id="l00093" name="l00093"></a><span class="lineno"><a class="line" href="classflow_1_1perf_1_1Checkpointing__timer.html#aabebe01d0d5096618a8a7c2cf52320fb">   93</a></span><a class="code hl_typedef" href="namespaceflow_1_1perf.html#aabd93a8a40158585ed149742d8937601">Clock_types_subset</a> <a class="code hl_function" href="classflow_1_1perf_1_1Checkpointing__timer.html#aabebe01d0d5096618a8a7c2cf52320fb">Checkpointing_timer::thread_cpu_clock_types</a>() <span class="comment">// Static.</span></div>
<div class="line"><a id="l00094" name="l00094"></a><span class="lineno">   94</span>{</div>
<div class="line"><a id="l00095" name="l00095"></a><span class="lineno">   95</span>  <a class="code hl_typedef" href="namespaceflow_1_1perf.html#aabd93a8a40158585ed149742d8937601">Clock_types_subset</a> clocks;</div>
<div class="line"><a id="l00096" name="l00096"></a><span class="lineno">   96</span>  clocks.set(<span class="keywordtype">size_t</span>(<a class="code hl_enumvalue" href="namespaceflow_1_1perf.html#ad61fb186191e4bb824d14601d11a2eb0a93867c73fb6ef991268c0052153344c2">Clock_type::S_CPU_THREAD_TOTAL_HI_RES</a>));</div>
<div class="line"><a id="l00097" name="l00097"></a><span class="lineno">   97</span>  <span class="keywordflow">return</span> clocks;</div>
<div class="line"><a id="l00098" name="l00098"></a><span class="lineno">   98</span>}</div>
<div class="line"><a id="l00099" name="l00099"></a><span class="lineno">   99</span> </div>
<div class="line"><a id="l00100" name="l00100"></a><span class="lineno"><a class="line" href="classflow_1_1perf_1_1Checkpointing__timer.html#a378be385d0c3dda261c8944551280010">  100</a></span><span class="keywordtype">void</span> <a class="code hl_function" href="classflow_1_1perf_1_1Checkpointing__timer.html#a378be385d0c3dda261c8944551280010">Checkpointing_timer::scale</a>(uint64_t mult_scale, uint64_t div_scale)</div>
<div class="line"><a id="l00101" name="l00101"></a><span class="lineno">  101</span>{</div>
<div class="line"><a id="l00102" name="l00102"></a><span class="lineno">  102</span>  assert(<a class="code hl_variable" href="classflow_1_1perf_1_1Checkpointing__timer.html#a9d064df3b46dd7e629f4d836a9803750">m_checkpoints</a>.size() != 0);</div>
<div class="line"><a id="l00103" name="l00103"></a><span class="lineno">  103</span> </div>
<div class="line"><a id="l00104" name="l00104"></a><span class="lineno">  104</span>  <span class="comment">/* Please see doc header for our contract.  Essentially we are to take a completed (1+ checkpoints) *this timer and</span></div>
<div class="line"><a id="l00105" name="l00105"></a><span class="lineno">  105</span><span class="comment">   * change it to be as if it started at the recorded time, but each of the checkpoints completed not in recorded time T</span></div>
<div class="line"><a id="l00106" name="l00106"></a><span class="lineno">  106</span><span class="comment">   * but time (T * mult_scale / div_scale).  This involves updating the checkpoints themselves; and</span></div>
<div class="line"><a id="l00107" name="l00107"></a><span class="lineno">  107</span><span class="comment">   * m_last_checkpoint_when which determines since_start(), the other key bit of user-interest info. */</span></div>
<div class="line"><a id="l00108" name="l00108"></a><span class="lineno">  108</span> </div>
<div class="line"><a id="l00109" name="l00109"></a><span class="lineno">  109</span>  <span class="comment">/* - Always multiply first; overflow is not happening (64-bit); meanwhile it avoids rounding error to extent possible.</span></div>
<div class="line"><a id="l00110" name="l00110"></a><span class="lineno">  110</span><span class="comment">   * - Reminder: all the stuff being modified aren&#39;t single values but arrays thereof (element per Clock_type). */</span></div>
<div class="line"><a id="l00111" name="l00111"></a><span class="lineno">  111</span> </div>
<div class="line"><a id="l00112" name="l00112"></a><span class="lineno">  112</span>  <span class="keywordflow">for</span> (<span class="keyword">auto</span>&amp; <a class="code hl_function" href="classflow_1_1perf_1_1Checkpointing__timer.html#a9e6078df059d5626ab5774f0a33fbad7">checkpoint</a> : <a class="code hl_variable" href="classflow_1_1perf_1_1Checkpointing__timer.html#a9d064df3b46dd7e629f4d836a9803750">m_checkpoints</a>)</div>
<div class="line"><a id="l00113" name="l00113"></a><span class="lineno">  113</span>  {</div>
<div class="line"><a id="l00114" name="l00114"></a><span class="lineno">  114</span>    <a class="code hl_function" href="classflow_1_1perf_1_1Checkpointing__timer.html#a9e6078df059d5626ab5774f0a33fbad7">checkpoint</a>.<a class="code hl_variable" href="structflow_1_1perf_1_1Checkpointing__timer_1_1Checkpoint.html#aacbec1a1e5600aeac4e7ca876060552f">m_since_last</a> *= mult_scale;</div>
<div class="line"><a id="l00115" name="l00115"></a><span class="lineno">  115</span>    <a class="code hl_function" href="classflow_1_1perf_1_1Checkpointing__timer.html#a9e6078df059d5626ab5774f0a33fbad7">checkpoint</a>.<a class="code hl_variable" href="structflow_1_1perf_1_1Checkpointing__timer_1_1Checkpoint.html#aacbec1a1e5600aeac4e7ca876060552f">m_since_last</a> /= div_scale;</div>
<div class="line"><a id="l00116" name="l00116"></a><span class="lineno">  116</span>  }</div>
<div class="line"><a id="l00117" name="l00117"></a><span class="lineno">  117</span> </div>
<div class="line"><a id="l00118" name="l00118"></a><span class="lineno">  118</span>  <span class="comment">/* Now let&#39;s &quot;fix&quot; since_start() accordingly.  Of course since_start() is not an lvalue but equals</span></div>
<div class="line"><a id="l00119" name="l00119"></a><span class="lineno">  119</span><span class="comment">   * (m_start_when + m_last_checkpoint_when).  m_start_when is unchanged; so we are to fix m_last_checkpoint_when.</span></div>
<div class="line"><a id="l00120" name="l00120"></a><span class="lineno">  120</span><span class="comment">   * An alternative way to think of it is simply that m_last_checkpoint_when == the time point(s) that resulted</span></div>
<div class="line"><a id="l00121" name="l00121"></a><span class="lineno">  121</span><span class="comment">   * in m_checkpoints.back().m_since_last; and we had changed all the `m_since_last`s including the final one. */</span></div>
<div class="line"><a id="l00122" name="l00122"></a><span class="lineno">  122</span>  <span class="keyword">auto</span> scaled_since_start = <a class="code hl_function" href="classflow_1_1perf_1_1Checkpointing__timer.html#afeb1faa0e4962dacf9b6a134191a4933">since_start</a>();</div>
<div class="line"><a id="l00123" name="l00123"></a><span class="lineno">  123</span>  scaled_since_start *= mult_scale;</div>
<div class="line"><a id="l00124" name="l00124"></a><span class="lineno">  124</span>  scaled_since_start /= div_scale;</div>
<div class="line"><a id="l00125" name="l00125"></a><span class="lineno">  125</span>  <a class="code hl_variable" href="classflow_1_1perf_1_1Checkpointing__timer.html#a66605dd59939ddc69d7f8fde19a5ed7c">m_last_checkpoint_when</a> = <a class="code hl_variable" href="classflow_1_1perf_1_1Checkpointing__timer.html#ac16b16c3192e287ae3f08be786626f1a">m_start_when</a>;</div>
<div class="line"><a id="l00126" name="l00126"></a><span class="lineno">  126</span>  <a class="code hl_variable" href="classflow_1_1perf_1_1Checkpointing__timer.html#a66605dd59939ddc69d7f8fde19a5ed7c">m_last_checkpoint_when</a> += scaled_since_start;</div>
<div class="line"><a id="l00127" name="l00127"></a><span class="lineno">  127</span>  <span class="comment">// (Could also get identical result by simply adding up all `checkpoint.m_since_last`s.)</span></div>
<div class="line"><a id="l00128" name="l00128"></a><span class="lineno">  128</span>} <span class="comment">// Checkpointing_timer::create_scaled()</span></div>
<div class="line"><a id="l00129" name="l00129"></a><span class="lineno">  129</span> </div>
<div class="line"><a id="l00130" name="l00130"></a><span class="lineno"><a class="line" href="classflow_1_1perf_1_1Checkpointing__timer.html#a3138f716f6f5b3973a5ed53f68a3c332">  130</a></span><a class="code hl_typedef" href="namespaceflow_1_1perf.html#ace5f154155a7d9d5c112c1a83aa04fb5">Time_pt</a> <a class="code hl_function" href="classflow_1_1perf_1_1Checkpointing__timer.html#a3b73f2812c2bf6a27ef2becc13859d73">Checkpointing_timer::now</a>(<a class="code hl_enumeration" href="namespaceflow_1_1perf.html#ad61fb186191e4bb824d14601d11a2eb0">Clock_type</a> clock_type)</div>
<div class="line"><a id="l00131" name="l00131"></a><span class="lineno">  131</span>{</div>
<div class="line"><a id="l00132" name="l00132"></a><span class="lineno">  132</span>  using ::timespec;</div>
<div class="line"><a id="l00133" name="l00133"></a><span class="lineno">  133</span>  using ::clock_gettime;</div>
<div class="line"><a id="l00134" name="l00134"></a><span class="lineno">  134</span><span class="preprocessor">#if 0 </span><span class="comment">// Not necessary anyway, but also in Linux this is a #define and hence not in a namespace.</span></div>
<div class="line"><a id="l00135" name="l00135"></a><span class="lineno">  135</span>  using ::CLOCK_PROCESS_CPUTIME_ID;</div>
<div class="line"><a id="l00136" name="l00136"></a><span class="lineno">  136</span><span class="preprocessor">#endif</span></div>
<div class="line"><a id="l00137" name="l00137"></a><span class="lineno">  137</span>  <span class="keyword">using </span>boost::chrono::duration;</div>
<div class="line"><a id="l00138" name="l00138"></a><span class="lineno">  138</span>  <span class="keyword">using </span>boost::chrono::nanoseconds;</div>
<div class="line"><a id="l00139" name="l00139"></a><span class="lineno">  139</span> </div>
<div class="line"><a id="l00140" name="l00140"></a><span class="lineno">  140</span>  <span class="comment">// Reminder: This call is extremely performance-centric.  Keep it very low-fat.</span></div>
<div class="line"><a id="l00141" name="l00141"></a><span class="lineno">  141</span> </div>
<div class="line"><a id="l00142" name="l00142"></a><span class="lineno">  142</span>  <span class="keywordflow">switch</span> (clock_type)</div>
<div class="line"><a id="l00143" name="l00143"></a><span class="lineno">  143</span>  {</div>
<div class="line"><a id="l00144" name="l00144"></a><span class="lineno">  144</span>    <span class="keywordflow">case</span> <a class="code hl_enumvalue" href="namespaceflow_1_1perf.html#ad61fb186191e4bb824d14601d11a2eb0a8cbf506eda585c026dfb5b72c402d342">Clock_type::S_REAL_HI_RES</a>:</div>
<div class="line"><a id="l00145" name="l00145"></a><span class="lineno">  145</span>      <span class="keywordflow">return</span> Fine_clock::now();</div>
<div class="line"><a id="l00146" name="l00146"></a><span class="lineno">  146</span>    <span class="keywordflow">case</span> <a class="code hl_enumvalue" href="namespaceflow_1_1perf.html#ad61fb186191e4bb824d14601d11a2eb0ae06b569eb44aff6a567186f4eddb12ed">Clock_type::S_CPU_USER_LO_RES</a>:</div>
<div class="line"><a id="l00147" name="l00147"></a><span class="lineno">  147</span>      <span class="keywordflow">return</span> <a class="code hl_function" href="classflow_1_1perf_1_1Checkpointing__timer.html#a82e717d5b1f6df56dc70b26c7da100f3">now_cpu_lo_res</a>(<a class="code hl_function" href="classflow_1_1perf_1_1Checkpointing__timer.html#a7c799f400ceddd5ad5529fa66f026fd0">now_cpu_lo_res_raw</a>(), <span class="keyword">true</span>);</div>
<div class="line"><a id="l00148" name="l00148"></a><span class="lineno">  148</span>    <span class="keywordflow">case</span> <a class="code hl_enumvalue" href="namespaceflow_1_1perf.html#ad61fb186191e4bb824d14601d11a2eb0a1490431155a134162390180995550ca7">Clock_type::S_CPU_SYS_LO_RES</a>:</div>
<div class="line"><a id="l00149" name="l00149"></a><span class="lineno">  149</span>      <span class="keywordflow">return</span> <a class="code hl_function" href="classflow_1_1perf_1_1Checkpointing__timer.html#a82e717d5b1f6df56dc70b26c7da100f3">now_cpu_lo_res</a>(<a class="code hl_function" href="classflow_1_1perf_1_1Checkpointing__timer.html#a7c799f400ceddd5ad5529fa66f026fd0">now_cpu_lo_res_raw</a>(), <span class="keyword">false</span>);</div>
<div class="line"><a id="l00150" name="l00150"></a><span class="lineno">  150</span>    <span class="keywordflow">case</span> <a class="code hl_enumvalue" href="namespaceflow_1_1perf.html#ad61fb186191e4bb824d14601d11a2eb0ac5c54159101dbdb580f0b16a9397d6f3">Clock_type::S_CPU_TOTAL_HI_RES</a>:</div>
<div class="line"><a id="l00151" name="l00151"></a><span class="lineno">  151</span>    {</div>
<div class="line"><a id="l00152" name="l00152"></a><span class="lineno">  152</span>      <span class="comment">/* @todo This is all fine, but ultimately the right thing to do would be to make a boost.chrono-ish clock</span></div>
<div class="line"><a id="l00153" name="l00153"></a><span class="lineno">  153</span><span class="comment">       * that does the following in its now().  In fact there is a boost.chrono Trac ticket to do just that.</span></div>
<div class="line"><a id="l00154" name="l00154"></a><span class="lineno">  154</span><span class="comment">       * Then &lt;that clock&gt;::now() would be called here. */</span></div>
<div class="line"><a id="l00155" name="l00155"></a><span class="lineno">  155</span>      timespec time_spec;</div>
<div class="line"><a id="l00156" name="l00156"></a><span class="lineno">  156</span><span class="preprocessor">#ifndef NDEBUG</span></div>
<div class="line"><a id="l00157" name="l00157"></a><span class="lineno">  157</span>    <span class="keyword">const</span> <span class="keywordtype">bool</span> ok = 0 ==</div>
<div class="line"><a id="l00158" name="l00158"></a><span class="lineno">  158</span><span class="preprocessor">#endif</span></div>
<div class="line"><a id="l00159" name="l00159"></a><span class="lineno">  159</span>      clock_gettime(CLOCK_PROCESS_CPUTIME_ID, &amp;time_spec);</div>
<div class="line"><a id="l00160" name="l00160"></a><span class="lineno">  160</span><span class="preprocessor">#ifndef NDEBUG</span></div>
<div class="line"><a id="l00161" name="l00161"></a><span class="lineno">  161</span>    assert(ok);</div>
<div class="line"><a id="l00162" name="l00162"></a><span class="lineno">  162</span><span class="preprocessor">#endif</span></div>
<div class="line"><a id="l00163" name="l00163"></a><span class="lineno">  163</span>      <span class="keywordflow">return</span> <a class="code hl_typedef" href="namespaceflow_1_1perf.html#ace5f154155a7d9d5c112c1a83aa04fb5">Time_pt</a>(nanoseconds(<a class="code hl_typedef" href="namespaceflow_1_1perf.html#a75b06c669e720c60621f3c68c3d34408">duration_rep_t</a>(time_spec.tv_sec) * <a class="code hl_typedef" href="namespaceflow_1_1perf.html#a75b06c669e720c60621f3c68c3d34408">duration_rep_t</a>(1000 * 1000 * 1000)</div>
<div class="line"><a id="l00164" name="l00164"></a><span class="lineno">  164</span>                                   + <a class="code hl_typedef" href="namespaceflow_1_1perf.html#a75b06c669e720c60621f3c68c3d34408">duration_rep_t</a>(time_spec.tv_nsec)));</div>
<div class="line"><a id="l00165" name="l00165"></a><span class="lineno">  165</span>    }</div>
<div class="line"><a id="l00166" name="l00166"></a><span class="lineno">  166</span>    <span class="keywordflow">case</span> <a class="code hl_enumvalue" href="namespaceflow_1_1perf.html#ad61fb186191e4bb824d14601d11a2eb0a93867c73fb6ef991268c0052153344c2">Clock_type::S_CPU_THREAD_TOTAL_HI_RES</a>:</div>
<div class="line"><a id="l00167" name="l00167"></a><span class="lineno">  167</span>    {</div>
<div class="line"><a id="l00168" name="l00168"></a><span class="lineno">  168</span>      <span class="comment">// Similar to just above... keeping comments light.</span></div>
<div class="line"><a id="l00169" name="l00169"></a><span class="lineno">  169</span>      timespec time_spec;</div>
<div class="line"><a id="l00170" name="l00170"></a><span class="lineno">  170</span><span class="preprocessor">#ifndef NDEBUG</span></div>
<div class="line"><a id="l00171" name="l00171"></a><span class="lineno">  171</span>    <span class="keyword">const</span> <span class="keywordtype">bool</span> ok = 0 ==</div>
<div class="line"><a id="l00172" name="l00172"></a><span class="lineno">  172</span><span class="preprocessor">#endif</span></div>
<div class="line"><a id="l00173" name="l00173"></a><span class="lineno">  173</span>      clock_gettime(CLOCK_THREAD_CPUTIME_ID, &amp;time_spec);</div>
<div class="line"><a id="l00174" name="l00174"></a><span class="lineno">  174</span><span class="preprocessor">#ifndef NDEBUG</span></div>
<div class="line"><a id="l00175" name="l00175"></a><span class="lineno">  175</span>    assert(ok);</div>
<div class="line"><a id="l00176" name="l00176"></a><span class="lineno">  176</span><span class="preprocessor">#endif</span></div>
<div class="line"><a id="l00177" name="l00177"></a><span class="lineno">  177</span>      <span class="keywordflow">return</span> <a class="code hl_typedef" href="namespaceflow_1_1perf.html#ace5f154155a7d9d5c112c1a83aa04fb5">Time_pt</a>(nanoseconds(<a class="code hl_typedef" href="namespaceflow_1_1perf.html#a75b06c669e720c60621f3c68c3d34408">duration_rep_t</a>(time_spec.tv_sec) * <a class="code hl_typedef" href="namespaceflow_1_1perf.html#a75b06c669e720c60621f3c68c3d34408">duration_rep_t</a>(1000 * 1000 * 1000)</div>
<div class="line"><a id="l00178" name="l00178"></a><span class="lineno">  178</span>                                   + <a class="code hl_typedef" href="namespaceflow_1_1perf.html#a75b06c669e720c60621f3c68c3d34408">duration_rep_t</a>(time_spec.tv_nsec)));</div>
<div class="line"><a id="l00179" name="l00179"></a><span class="lineno">  179</span>    }</div>
<div class="line"><a id="l00180" name="l00180"></a><span class="lineno">  180</span>    <span class="keywordflow">case</span> <a class="code hl_enumvalue" href="namespaceflow_1_1perf.html#ad61fb186191e4bb824d14601d11a2eb0a6fba12db09e5bebfaa04f6372c41c2cf">Clock_type::S_END_SENTINEL</a>:</div>
<div class="line"><a id="l00181" name="l00181"></a><span class="lineno">  181</span>      assert(<span class="keyword">false</span> &amp;&amp; <span class="stringliteral">&quot;END_SENTINEL passed to now() -- must specify actual Clock_type.&quot;</span>);</div>
<div class="line"><a id="l00182" name="l00182"></a><span class="lineno">  182</span>    <span class="comment">// Intentional: no `default:` -- to trigger typical compiler warning if an enum value is forgotten.</span></div>
<div class="line"><a id="l00183" name="l00183"></a><span class="lineno">  183</span>  }</div>
<div class="line"><a id="l00184" name="l00184"></a><span class="lineno">  184</span> </div>
<div class="line"><a id="l00185" name="l00185"></a><span class="lineno">  185</span>  assert(<span class="keyword">false</span> &amp;&amp; <span class="stringliteral">&quot;Bug?  now() forgot to handle a Clock_type, yet compiler did not warn in switch()?&quot;</span>);</div>
<div class="line"><a id="l00186" name="l00186"></a><span class="lineno">  186</span>  <span class="keywordflow">return</span> <a class="code hl_typedef" href="namespaceflow_1_1perf.html#ace5f154155a7d9d5c112c1a83aa04fb5">Time_pt</a>();</div>
<div class="line"><a id="l00187" name="l00187"></a><span class="lineno">  187</span>} <span class="comment">// Checkpointing_timer::now(Clock_type)</span></div>
<div class="line"><a id="l00188" name="l00188"></a><span class="lineno">  188</span> </div>
<div class="line"><a id="l00189" name="l00189"></a><span class="lineno"><a class="line" href="classflow_1_1perf_1_1Checkpointing__timer.html#a019df7b02e8aed1e86002c8a7b40dcf7">  189</a></span><a class="code hl_struct" href="structflow_1_1perf_1_1Time__pt__set.html">Time_pt_set</a> <a class="code hl_function" href="classflow_1_1perf_1_1Checkpointing__timer.html#a3b73f2812c2bf6a27ef2becc13859d73">Checkpointing_timer::now</a>(<span class="keyword">const</span> <a class="code hl_typedef" href="namespaceflow_1_1perf.html#aabd93a8a40158585ed149742d8937601">Clock_types_subset</a>&amp; which_clocks) <span class="comment">// Static.</span></div>
<div class="line"><a id="l00190" name="l00190"></a><span class="lineno">  190</span>{</div>
<div class="line"><a id="l00191" name="l00191"></a><span class="lineno">  191</span>  <span class="comment">/* Reminder: This call is extremely performance-centric.  Keep it very low-fat.</span></div>
<div class="line"><a id="l00192" name="l00192"></a><span class="lineno">  192</span><span class="comment">   * Get all the clock values that were specified to get.  Others skipped for performance. */</span></div>
<div class="line"><a id="l00193" name="l00193"></a><span class="lineno">  193</span> </div>
<div class="line"><a id="l00194" name="l00194"></a><span class="lineno">  194</span>  <a class="code hl_struct" href="structflow_1_1perf_1_1Time__pt__set.html">Time_pt_set</a> time_pt_set; <span class="comment">// Uninitialized garbage.</span></div>
<div class="line"><a id="l00195" name="l00195"></a><span class="lineno">  195</span>  <span class="comment">/* Would be unnecessary except that aggregation elsewhere doesn&#39;t worry about m_which_clocks.</span></div>
<div class="line"><a id="l00196" name="l00196"></a><span class="lineno">  196</span><span class="comment">   * So just leave unused clock types&#39; values at 0, and then aggregation will just add up a bunch of zeroes,</span></div>
<div class="line"><a id="l00197" name="l00197"></a><span class="lineno">  197</span><span class="comment">   * when performance no longer matters.  This fill() should be quite cheap.</span></div>
<div class="line"><a id="l00198" name="l00198"></a><span class="lineno">  198</span><span class="comment">   * Also, string/stream output will list 0 on unused clocks instead of printing potential garbage. */</span></div>
<div class="line"><a id="l00199" name="l00199"></a><span class="lineno">  199</span>  time_pt_set.<a class="code hl_variable" href="structflow_1_1perf_1_1Time__pt__set.html#a9867f05832f22c6aceb340c0ba697dbc">m_values</a>.fill(<a class="code hl_typedef" href="namespaceflow_1_1perf.html#ace5f154155a7d9d5c112c1a83aa04fb5">Time_pt</a>());</div>
<div class="line"><a id="l00200" name="l00200"></a><span class="lineno">  200</span> </div>
<div class="line"><a id="l00201" name="l00201"></a><span class="lineno">  201</span>  <span class="keyword">const</span> <span class="keywordtype">bool</span> do_cpu_user_lo = which_clocks[size_t(<a class="code hl_enumvalue" href="namespaceflow_1_1perf.html#ad61fb186191e4bb824d14601d11a2eb0ae06b569eb44aff6a567186f4eddb12ed">Clock_type::S_CPU_USER_LO_RES</a>)];</div>
<div class="line"><a id="l00202" name="l00202"></a><span class="lineno">  202</span>  <span class="keyword">const</span> <span class="keywordtype">bool</span> do_cpu_sys_lo = which_clocks[size_t(<a class="code hl_enumvalue" href="namespaceflow_1_1perf.html#ad61fb186191e4bb824d14601d11a2eb0a1490431155a134162390180995550ca7">Clock_type::S_CPU_SYS_LO_RES</a>)];</div>
<div class="line"><a id="l00203" name="l00203"></a><span class="lineno">  203</span>  <span class="keywordflow">if</span> (do_cpu_user_lo || do_cpu_sys_lo)</div>
<div class="line"><a id="l00204" name="l00204"></a><span class="lineno">  204</span>  {</div>
<div class="line"><a id="l00205" name="l00205"></a><span class="lineno">  205</span>    <span class="keyword">const</span> <span class="keyword">auto</span> cpu_combo_now_raw = <a class="code hl_function" href="classflow_1_1perf_1_1Checkpointing__timer.html#a7c799f400ceddd5ad5529fa66f026fd0">now_cpu_lo_res_raw</a>();</div>
<div class="line"><a id="l00206" name="l00206"></a><span class="lineno">  206</span>    <span class="keywordflow">if</span> (do_cpu_user_lo)</div>
<div class="line"><a id="l00207" name="l00207"></a><span class="lineno">  207</span>    {</div>
<div class="line"><a id="l00208" name="l00208"></a><span class="lineno">  208</span>      time_pt_set.<a class="code hl_variable" href="structflow_1_1perf_1_1Time__pt__set.html#a9867f05832f22c6aceb340c0ba697dbc">m_values</a>[size_t(<a class="code hl_enumvalue" href="namespaceflow_1_1perf.html#ad61fb186191e4bb824d14601d11a2eb0ae06b569eb44aff6a567186f4eddb12ed">Clock_type::S_CPU_USER_LO_RES</a>)] = <a class="code hl_function" href="classflow_1_1perf_1_1Checkpointing__timer.html#a82e717d5b1f6df56dc70b26c7da100f3">now_cpu_lo_res</a>(cpu_combo_now_raw, <span class="keyword">true</span>);</div>
<div class="line"><a id="l00209" name="l00209"></a><span class="lineno">  209</span>      <span class="keywordflow">if</span> (do_cpu_sys_lo) <span class="comment">// Doing this within the `if (){}` is a cheesy optimization... we&#39;re trying hard here.</span></div>
<div class="line"><a id="l00210" name="l00210"></a><span class="lineno">  210</span>      {</div>
<div class="line"><a id="l00211" name="l00211"></a><span class="lineno">  211</span>        time_pt_set.<a class="code hl_variable" href="structflow_1_1perf_1_1Time__pt__set.html#a9867f05832f22c6aceb340c0ba697dbc">m_values</a>[size_t(<a class="code hl_enumvalue" href="namespaceflow_1_1perf.html#ad61fb186191e4bb824d14601d11a2eb0a1490431155a134162390180995550ca7">Clock_type::S_CPU_SYS_LO_RES</a>)] = <a class="code hl_function" href="classflow_1_1perf_1_1Checkpointing__timer.html#a82e717d5b1f6df56dc70b26c7da100f3">now_cpu_lo_res</a>(cpu_combo_now_raw, <span class="keyword">false</span>);</div>
<div class="line"><a id="l00212" name="l00212"></a><span class="lineno">  212</span>      }</div>
<div class="line"><a id="l00213" name="l00213"></a><span class="lineno">  213</span>    }</div>
<div class="line"><a id="l00214" name="l00214"></a><span class="lineno">  214</span>    <span class="keywordflow">else</span> <span class="comment">// Continue the cheesy optimization started just above.</span></div>
<div class="line"><a id="l00215" name="l00215"></a><span class="lineno">  215</span>    {</div>
<div class="line"><a id="l00216" name="l00216"></a><span class="lineno">  216</span>      time_pt_set.<a class="code hl_variable" href="structflow_1_1perf_1_1Time__pt__set.html#a9867f05832f22c6aceb340c0ba697dbc">m_values</a>[size_t(<a class="code hl_enumvalue" href="namespaceflow_1_1perf.html#ad61fb186191e4bb824d14601d11a2eb0a1490431155a134162390180995550ca7">Clock_type::S_CPU_SYS_LO_RES</a>)] = <a class="code hl_function" href="classflow_1_1perf_1_1Checkpointing__timer.html#a82e717d5b1f6df56dc70b26c7da100f3">now_cpu_lo_res</a>(cpu_combo_now_raw, <span class="keyword">false</span>);</div>
<div class="line"><a id="l00217" name="l00217"></a><span class="lineno">  217</span>    }</div>
<div class="line"><a id="l00218" name="l00218"></a><span class="lineno">  218</span>  }</div>
<div class="line"><a id="l00219" name="l00219"></a><span class="lineno">  219</span> </div>
<div class="line"><a id="l00220" name="l00220"></a><span class="lineno">  220</span>  <span class="keywordflow">if</span> (which_clocks[<span class="keywordtype">size_t</span>(<a class="code hl_enumvalue" href="namespaceflow_1_1perf.html#ad61fb186191e4bb824d14601d11a2eb0ac5c54159101dbdb580f0b16a9397d6f3">Clock_type::S_CPU_TOTAL_HI_RES</a>)])</div>
<div class="line"><a id="l00221" name="l00221"></a><span class="lineno">  221</span>  {</div>
<div class="line"><a id="l00222" name="l00222"></a><span class="lineno">  222</span>    time_pt_set.<a class="code hl_variable" href="structflow_1_1perf_1_1Time__pt__set.html#a9867f05832f22c6aceb340c0ba697dbc">m_values</a>[size_t(<a class="code hl_enumvalue" href="namespaceflow_1_1perf.html#ad61fb186191e4bb824d14601d11a2eb0ac5c54159101dbdb580f0b16a9397d6f3">Clock_type::S_CPU_TOTAL_HI_RES</a>)]</div>
<div class="line"><a id="l00223" name="l00223"></a><span class="lineno">  223</span>      = <a class="code hl_function" href="classflow_1_1perf_1_1Checkpointing__timer.html#a3b73f2812c2bf6a27ef2becc13859d73">Checkpointing_timer::now</a>(<a class="code hl_enumvalue" href="namespaceflow_1_1perf.html#ad61fb186191e4bb824d14601d11a2eb0ac5c54159101dbdb580f0b16a9397d6f3">Clock_type::S_CPU_TOTAL_HI_RES</a>);</div>
<div class="line"><a id="l00224" name="l00224"></a><span class="lineno">  224</span>  }</div>
<div class="line"><a id="l00225" name="l00225"></a><span class="lineno">  225</span> </div>
<div class="line"><a id="l00226" name="l00226"></a><span class="lineno">  226</span>  <span class="keywordflow">if</span> (which_clocks[<span class="keywordtype">size_t</span>(<a class="code hl_enumvalue" href="namespaceflow_1_1perf.html#ad61fb186191e4bb824d14601d11a2eb0a93867c73fb6ef991268c0052153344c2">Clock_type::S_CPU_THREAD_TOTAL_HI_RES</a>)])</div>
<div class="line"><a id="l00227" name="l00227"></a><span class="lineno">  227</span>  {</div>
<div class="line"><a id="l00228" name="l00228"></a><span class="lineno">  228</span>    time_pt_set.<a class="code hl_variable" href="structflow_1_1perf_1_1Time__pt__set.html#a9867f05832f22c6aceb340c0ba697dbc">m_values</a>[size_t(<a class="code hl_enumvalue" href="namespaceflow_1_1perf.html#ad61fb186191e4bb824d14601d11a2eb0a93867c73fb6ef991268c0052153344c2">Clock_type::S_CPU_THREAD_TOTAL_HI_RES</a>)]</div>
<div class="line"><a id="l00229" name="l00229"></a><span class="lineno">  229</span>      = <a class="code hl_function" href="classflow_1_1perf_1_1Checkpointing__timer.html#a3b73f2812c2bf6a27ef2becc13859d73">Checkpointing_timer::now</a>(<a class="code hl_enumvalue" href="namespaceflow_1_1perf.html#ad61fb186191e4bb824d14601d11a2eb0a93867c73fb6ef991268c0052153344c2">Clock_type::S_CPU_THREAD_TOTAL_HI_RES</a>);</div>
<div class="line"><a id="l00230" name="l00230"></a><span class="lineno">  230</span>  }</div>
<div class="line"><a id="l00231" name="l00231"></a><span class="lineno">  231</span> </div>
<div class="line"><a id="l00232" name="l00232"></a><span class="lineno">  232</span>  <span class="keywordflow">if</span> (which_clocks[<span class="keywordtype">size_t</span>(<a class="code hl_enumvalue" href="namespaceflow_1_1perf.html#ad61fb186191e4bb824d14601d11a2eb0a8cbf506eda585c026dfb5b72c402d342">Clock_type::S_REAL_HI_RES</a>)])</div>
<div class="line"><a id="l00233" name="l00233"></a><span class="lineno">  233</span>  {</div>
<div class="line"><a id="l00234" name="l00234"></a><span class="lineno">  234</span>    time_pt_set.<a class="code hl_variable" href="structflow_1_1perf_1_1Time__pt__set.html#a9867f05832f22c6aceb340c0ba697dbc">m_values</a>[size_t(<a class="code hl_enumvalue" href="namespaceflow_1_1perf.html#ad61fb186191e4bb824d14601d11a2eb0a8cbf506eda585c026dfb5b72c402d342">Clock_type::S_REAL_HI_RES</a>)]</div>
<div class="line"><a id="l00235" name="l00235"></a><span class="lineno">  235</span>      = <a class="code hl_function" href="classflow_1_1perf_1_1Checkpointing__timer.html#a3b73f2812c2bf6a27ef2becc13859d73">Checkpointing_timer::now</a>(<a class="code hl_enumvalue" href="namespaceflow_1_1perf.html#ad61fb186191e4bb824d14601d11a2eb0a8cbf506eda585c026dfb5b72c402d342">Clock_type::S_REAL_HI_RES</a>);</div>
<div class="line"><a id="l00236" name="l00236"></a><span class="lineno">  236</span>  }</div>
<div class="line"><a id="l00237" name="l00237"></a><span class="lineno">  237</span> </div>
<div class="line"><a id="l00238" name="l00238"></a><span class="lineno">  238</span>  <span class="keywordflow">return</span> time_pt_set;</div>
<div class="line"><a id="l00239" name="l00239"></a><span class="lineno">  239</span>} <span class="comment">// Checkpointing_timer::now(Clock_types_subset)</span></div>
<div class="line"><a id="l00240" name="l00240"></a><span class="lineno">  240</span> </div>
<div class="line"><a id="l00241" name="l00241"></a><span class="lineno"><a class="line" href="classflow_1_1perf_1_1Checkpointing__timer.html#a3b73f2812c2bf6a27ef2becc13859d73">  241</a></span><a class="code hl_struct" href="structflow_1_1perf_1_1Time__pt__set.html">Time_pt_set</a> <a class="code hl_function" href="classflow_1_1perf_1_1Checkpointing__timer.html#a3b73f2812c2bf6a27ef2becc13859d73">Checkpointing_timer::now</a>()<span class="keyword"> const</span></div>
<div class="line"><a id="l00242" name="l00242"></a><span class="lineno">  242</span><span class="keyword"></span>{</div>
<div class="line"><a id="l00243" name="l00243"></a><span class="lineno">  243</span>  <span class="keywordflow">return</span> <a class="code hl_function" href="classflow_1_1perf_1_1Checkpointing__timer.html#a3b73f2812c2bf6a27ef2becc13859d73">now</a>(<a class="code hl_variable" href="classflow_1_1perf_1_1Checkpointing__timer.html#ac5518c3fdc58f8867ca114186562575b">m_which_clocks</a>);</div>
<div class="line"><a id="l00244" name="l00244"></a><span class="lineno">  244</span>}</div>
<div class="line"><a id="l00245" name="l00245"></a><span class="lineno">  245</span> </div>
<div class="line"><a id="l00246" name="l00246"></a><span class="lineno"><a class="line" href="classflow_1_1perf_1_1Checkpointing__timer.html#a7c799f400ceddd5ad5529fa66f026fd0">  246</a></span><a class="code hl_typedef" href="classflow_1_1perf_1_1Checkpointing__timer.html#af14cca9bf47de862b19f04a9348de234">Checkpointing_timer::Cpu_split_clock_durs_since_epoch</a> <a class="code hl_function" href="classflow_1_1perf_1_1Checkpointing__timer.html#a7c799f400ceddd5ad5529fa66f026fd0">Checkpointing_timer::now_cpu_lo_res_raw</a>() <span class="comment">// Static.</span></div>
<div class="line"><a id="l00247" name="l00247"></a><span class="lineno">  247</span>{</div>
<div class="line"><a id="l00248" name="l00248"></a><span class="lineno">  248</span>  <span class="comment">// This is a struct of raw integers, each of which is a tick count since some epoch ref pt.</span></div>
<div class="line"><a id="l00249" name="l00249"></a><span class="lineno">  249</span>  <span class="keywordflow">return</span> Cpu_split_clock::now().time_since_epoch().count();</div>
<div class="line"><a id="l00250" name="l00250"></a><span class="lineno">  250</span>}</div>
<div class="line"><a id="l00251" name="l00251"></a><span class="lineno">  251</span> </div>
<div class="line"><a id="l00252" name="l00252"></a><span class="lineno"><a class="line" href="classflow_1_1perf_1_1Checkpointing__timer.html#a82e717d5b1f6df56dc70b26c7da100f3">  252</a></span><a class="code hl_typedef" href="namespaceflow_1_1perf.html#ace5f154155a7d9d5c112c1a83aa04fb5">Time_pt</a> <a class="code hl_function" href="classflow_1_1perf_1_1Checkpointing__timer.html#a82e717d5b1f6df56dc70b26c7da100f3">Checkpointing_timer::now_cpu_lo_res</a>(<span class="keyword">const</span> <a class="code hl_typedef" href="classflow_1_1perf_1_1Checkpointing__timer.html#af14cca9bf47de862b19f04a9348de234">Cpu_split_clock_durs_since_epoch</a>&amp; cpu_combo_now_raw,</div>
<div class="line"><a id="l00253" name="l00253"></a><span class="lineno">  253</span>                                            <span class="keywordtype">bool</span> user_else_sys) <span class="comment">// Static.</span></div>
<div class="line"><a id="l00254" name="l00254"></a><span class="lineno">  254</span>{</div>
<div class="line"><a id="l00255" name="l00255"></a><span class="lineno">  255</span>  <span class="keyword">using </span>boost::chrono::nanoseconds;</div>
<div class="line"><a id="l00256" name="l00256"></a><span class="lineno">  256</span> </div>
<div class="line"><a id="l00257" name="l00257"></a><span class="lineno">  257</span>  <span class="comment">/* &quot;Rebuild&quot; the duration type of each *individual* component of the split-by-time-type struct stored by the</span></div>
<div class="line"><a id="l00258" name="l00258"></a><span class="lineno">  258</span><span class="comment">   * Cpu_split_clock&#39;s unusual duration type.  So the latter is like duration&lt;::times, N&gt;, where N is likely</span></div>
<div class="line"><a id="l00259" name="l00259"></a><span class="lineno">  259</span><span class="comment">   * nano but could be something less precise; and the following is therefore like duration&lt;uint64, N&gt;.</span></div>
<div class="line"><a id="l00260" name="l00260"></a><span class="lineno">  260</span><span class="comment">   * The key is that N needs to be the same; otherwise the below construction of a final Duration will use</span></div>
<div class="line"><a id="l00261" name="l00261"></a><span class="lineno">  261</span><span class="comment">   * the wrong unit.  (This is inside-baseball of this somewhat obscure boost.chrono class Cpu_split_clock.) */</span></div>
<div class="line"><a id="l00262" name="l00262"></a><span class="lineno">  262</span>  <span class="keyword">using </span>Cpu_split_component_duration = boost::chrono::duration&lt;nanoseconds::rep, Cpu_split_clock::period&gt;;</div>
<div class="line"><a id="l00263" name="l00263"></a><span class="lineno">  263</span> </div>
<div class="line"><a id="l00264" name="l00264"></a><span class="lineno">  264</span>  <span class="comment">/* cpu_combo_now_raw is a struct of raw integers, each of which is a tick count for Cpu_split_component_duration,</span></div>
<div class="line"><a id="l00265" name="l00265"></a><span class="lineno">  265</span><span class="comment">   * hence we can construct Cpu_split_component_duration from each.  Probably type of each of the following is</span></div>
<div class="line"><a id="l00266" name="l00266"></a><span class="lineno">  266</span><span class="comment">   * nanoseconds; but anything with that resolution or worse will convert OK.  Otherwise it wouldn&#39;t compile below</span></div>
<div class="line"><a id="l00267" name="l00267"></a><span class="lineno">  267</span><span class="comment">   * when converting to Duration in the construction of Time_pt. */</span></div>
<div class="line"><a id="l00268" name="l00268"></a><span class="lineno">  268</span>  <span class="keywordflow">return</span> <a class="code hl_typedef" href="namespaceflow_1_1perf.html#ace5f154155a7d9d5c112c1a83aa04fb5">Time_pt</a>(<a class="code hl_typedef" href="namespaceflow_1_1perf.html#a38e42ae0923eb23052e3a8a1e7956456">Duration</a>(Cpu_split_component_duration(user_else_sys ? cpu_combo_now_raw.user</div>
<div class="line"><a id="l00269" name="l00269"></a><span class="lineno">  269</span>                                                                     : cpu_combo_now_raw.system)));</div>
<div class="line"><a id="l00270" name="l00270"></a><span class="lineno">  270</span>} <span class="comment">// Checkpointing_timer::now_cpu_lo_res()</span></div>
<div class="line"><a id="l00271" name="l00271"></a><span class="lineno">  271</span> </div>
<div class="line"><a id="l00272" name="l00272"></a><span class="lineno"><a class="line" href="classflow_1_1perf_1_1Checkpointing__timer.html#a9e6078df059d5626ab5774f0a33fbad7">  272</a></span><span class="keyword">const</span> <a class="code hl_struct" href="structflow_1_1perf_1_1Checkpointing__timer_1_1Checkpoint.html">Checkpointing_timer::Checkpoint</a>&amp; <a class="code hl_function" href="classflow_1_1perf_1_1Checkpointing__timer.html#a9e6078df059d5626ab5774f0a33fbad7">Checkpointing_timer::checkpoint</a>(std::string&amp;&amp; name_moved)</div>
<div class="line"><a id="l00273" name="l00273"></a><span class="lineno">  273</span>{</div>
<div class="line"><a id="l00274" name="l00274"></a><span class="lineno">  274</span>  <span class="comment">// Reminder: This call is extremely performance-centric.  Keep it very low-fat.  Obviously that includes now() call:</span></div>
<div class="line"><a id="l00275" name="l00275"></a><span class="lineno">  275</span> </div>
<div class="line"><a id="l00276" name="l00276"></a><span class="lineno">  276</span>  <span class="comment">// Get the time ASAP, being as close to the potential end of measured user operation as possible.</span></div>
<div class="line"><a id="l00277" name="l00277"></a><span class="lineno">  277</span>  <span class="keyword">const</span> <span class="keyword">auto</span> checkpoint_when = <a class="code hl_function" href="classflow_1_1perf_1_1Checkpointing__timer.html#a3b73f2812c2bf6a27ef2becc13859d73">now</a>();</div>
<div class="line"><a id="l00278" name="l00278"></a><span class="lineno">  278</span> </div>
<div class="line"><a id="l00279" name="l00279"></a><span class="lineno">  279</span>  <span class="comment">// We don&#39;t want to allocate after initial reserve().  Ctor doc header (as of this writing) says undefined behavior.</span></div>
<div class="line"><a id="l00280" name="l00280"></a><span class="lineno">  280</span>  assert((<a class="code hl_variable" href="classflow_1_1perf_1_1Checkpointing__timer.html#a9d064df3b46dd7e629f4d836a9803750">m_checkpoints</a>.size() + 1) &lt;= <a class="code hl_variable" href="classflow_1_1perf_1_1Checkpointing__timer.html#a9d064df3b46dd7e629f4d836a9803750">m_checkpoints</a>.capacity());</div>
<div class="line"><a id="l00281" name="l00281"></a><span class="lineno">  281</span>  <span class="comment">// Save the new checkpoint.</span></div>
<div class="line"><a id="l00282" name="l00282"></a><span class="lineno">  282</span>  <a class="code hl_variable" href="classflow_1_1perf_1_1Checkpointing__timer.html#a9d064df3b46dd7e629f4d836a9803750">m_checkpoints</a>.push_back({ std::move(name_moved),</div>
<div class="line"><a id="l00283" name="l00283"></a><span class="lineno">  283</span>                            checkpoint_when - <a class="code hl_variable" href="classflow_1_1perf_1_1Checkpointing__timer.html#a66605dd59939ddc69d7f8fde19a5ed7c">m_last_checkpoint_when</a> });</div>
<div class="line"><a id="l00284" name="l00284"></a><span class="lineno">  284</span>  <span class="comment">// Update invariant.</span></div>
<div class="line"><a id="l00285" name="l00285"></a><span class="lineno">  285</span>  <a class="code hl_variable" href="classflow_1_1perf_1_1Checkpointing__timer.html#a66605dd59939ddc69d7f8fde19a5ed7c">m_last_checkpoint_when</a> = checkpoint_when;</div>
<div class="line"><a id="l00286" name="l00286"></a><span class="lineno">  286</span> </div>
<div class="line"><a id="l00287" name="l00287"></a><span class="lineno">  287</span>  <a class="code hl_define" href="log_8hpp.html#affcf2e4c496ce3f42adf981669c623b8">FLOW_LOG_TRACE</a>(<span class="stringliteral">&quot;Timer [&quot;</span> &lt;&lt; <a class="code hl_variable" href="classflow_1_1perf_1_1Checkpointing__timer.html#a25981d44a91e1315bd92711d6e18a91b">m_name</a> &lt;&lt; <span class="stringliteral">&quot;]: Added checkpoint # [&quot;</span> &lt;&lt; (<a class="code hl_variable" href="classflow_1_1perf_1_1Checkpointing__timer.html#a9d064df3b46dd7e629f4d836a9803750">m_checkpoints</a>.size() - 1) &lt;&lt; <span class="stringliteral">&quot;]: &quot;</span></div>
<div class="line"><a id="l00288" name="l00288"></a><span class="lineno">  288</span>                 <span class="stringliteral">&quot;[&quot;</span> &lt;&lt; <a class="code hl_variable" href="classflow_1_1perf_1_1Checkpointing__timer.html#a9d064df3b46dd7e629f4d836a9803750">m_checkpoints</a>.back() &lt;&lt; <span class="stringliteral">&quot;]; total elapsed [&quot;</span> &lt;&lt; <a class="code hl_function" href="classflow_1_1perf_1_1Checkpointing__timer.html#afeb1faa0e4962dacf9b6a134191a4933">since_start</a>() &lt;&lt; <span class="stringliteral">&quot;].&quot;</span>);</div>
<div class="line"><a id="l00289" name="l00289"></a><span class="lineno">  289</span> </div>
<div class="line"><a id="l00290" name="l00290"></a><span class="lineno">  290</span>  <span class="keywordflow">return</span> <a class="code hl_variable" href="classflow_1_1perf_1_1Checkpointing__timer.html#a9d064df3b46dd7e629f4d836a9803750">m_checkpoints</a>.back();</div>
<div class="line"><a id="l00291" name="l00291"></a><span class="lineno">  291</span>}</div>
<div class="line"><a id="l00292" name="l00292"></a><span class="lineno">  292</span> </div>
<div class="line"><a id="l00293" name="l00293"></a><span class="lineno"><a class="line" href="classflow_1_1perf_1_1Checkpointing__timer.html#afeb1faa0e4962dacf9b6a134191a4933">  293</a></span><a class="code hl_struct" href="structflow_1_1perf_1_1Duration__set.html">Duration_set</a> <a class="code hl_function" href="classflow_1_1perf_1_1Checkpointing__timer.html#afeb1faa0e4962dacf9b6a134191a4933">Checkpointing_timer::since_start</a>()<span class="keyword"> const</span></div>
<div class="line"><a id="l00294" name="l00294"></a><span class="lineno">  294</span><span class="keyword"></span>{</div>
<div class="line"><a id="l00295" name="l00295"></a><span class="lineno">  295</span>  assert(!<a class="code hl_variable" href="classflow_1_1perf_1_1Checkpointing__timer.html#a9d064df3b46dd7e629f4d836a9803750">m_checkpoints</a>.empty());</div>
<div class="line"><a id="l00296" name="l00296"></a><span class="lineno">  296</span>  <span class="keywordflow">return</span> <a class="code hl_variable" href="classflow_1_1perf_1_1Checkpointing__timer.html#a66605dd59939ddc69d7f8fde19a5ed7c">m_last_checkpoint_when</a> - <a class="code hl_variable" href="classflow_1_1perf_1_1Checkpointing__timer.html#ac16b16c3192e287ae3f08be786626f1a">m_start_when</a>; <span class="comment">// This is why m_last_checkpoint_when exists.</span></div>
<div class="line"><a id="l00297" name="l00297"></a><span class="lineno">  297</span>}</div>
<div class="line"><a id="l00298" name="l00298"></a><span class="lineno">  298</span> </div>
<div class="line"><a id="l00299" name="l00299"></a><span class="lineno"><a class="line" href="classflow_1_1perf_1_1Checkpointing__timer.html#a1f03d654924a3724e1f051c119f3767b">  299</a></span><span class="keyword">const</span> std::vector&lt;Checkpointing_timer::Checkpoint&gt;&amp; <a class="code hl_function" href="classflow_1_1perf_1_1Checkpointing__timer.html#a1f03d654924a3724e1f051c119f3767b">Checkpointing_timer::checkpoints</a>()<span class="keyword"> const</span></div>
<div class="line"><a id="l00300" name="l00300"></a><span class="lineno">  300</span><span class="keyword"></span>{</div>
<div class="line"><a id="l00301" name="l00301"></a><span class="lineno">  301</span>  <span class="keywordflow">return</span> <a class="code hl_variable" href="classflow_1_1perf_1_1Checkpointing__timer.html#a9d064df3b46dd7e629f4d836a9803750">m_checkpoints</a>;</div>
<div class="line"><a id="l00302" name="l00302"></a><span class="lineno">  302</span>}</div>
<div class="line"><a id="l00303" name="l00303"></a><span class="lineno">  303</span> </div>
<div class="line"><a id="l00304" name="l00304"></a><span class="lineno"><a class="line" href="classflow_1_1perf_1_1Checkpointing__timer.html#a07204b9119b94bc10d53a8ba15c44797">  304</a></span><span class="keywordtype">void</span> <a class="code hl_function" href="classflow_1_1perf_1_1Checkpointing__timer.html#a07204b9119b94bc10d53a8ba15c44797">Checkpointing_timer::output</a>(std::ostream* os)<span class="keyword"> const</span></div>
<div class="line"><a id="l00305" name="l00305"></a><span class="lineno">  305</span><span class="keyword"></span>{</div>
<div class="line"><a id="l00306" name="l00306"></a><span class="lineno">  306</span>  <span class="comment">// We promised to have multi-lines but no trailing newline.  Basically assume we start on column 0.</span></div>
<div class="line"><a id="l00307" name="l00307"></a><span class="lineno">  307</span>  assert(!<a class="code hl_variable" href="classflow_1_1perf_1_1Checkpointing__timer.html#a9d064df3b46dd7e629f4d836a9803750">m_checkpoints</a>.empty());</div>
<div class="line"><a id="l00308" name="l00308"></a><span class="lineno">  308</span> </div>
<div class="line"><a id="l00309" name="l00309"></a><span class="lineno">  309</span>  (*os)</div>
<div class="line"><a id="l00310" name="l00310"></a><span class="lineno">  310</span>    &lt;&lt;</div>
<div class="line"><a id="l00311" name="l00311"></a><span class="lineno">  311</span>    <span class="stringliteral">&quot;--- Timer [&quot;</span> &lt;&lt; <a class="code hl_variable" href="classflow_1_1perf_1_1Checkpointing__timer.html#a25981d44a91e1315bd92711d6e18a91b">m_name</a> &lt;&lt; <span class="stringliteral">&quot;] ----\n&quot;</span></div>
<div class="line"><a id="l00312" name="l00312"></a><span class="lineno">  312</span>    <span class="stringliteral">&quot;Checkpoints (count = [&quot;</span> &lt;&lt; <a class="code hl_variable" href="classflow_1_1perf_1_1Checkpointing__timer.html#a9d064df3b46dd7e629f4d836a9803750">m_checkpoints</a>.size() &lt;&lt; <span class="stringliteral">&quot;]):\n&quot;</span>;</div>
<div class="line"><a id="l00313" name="l00313"></a><span class="lineno">  313</span> </div>
<div class="line"><a id="l00314" name="l00314"></a><span class="lineno">  314</span>  <span class="keywordtype">size_t</span> idx = 0;</div>
<div class="line"><a id="l00315" name="l00315"></a><span class="lineno">  315</span>  <span class="keywordflow">for</span> (<span class="keyword">const</span> <span class="keyword">auto</span>&amp; <a class="code hl_function" href="classflow_1_1perf_1_1Checkpointing__timer.html#a9e6078df059d5626ab5774f0a33fbad7">checkpoint</a> : <a class="code hl_variable" href="classflow_1_1perf_1_1Checkpointing__timer.html#a9d064df3b46dd7e629f4d836a9803750">m_checkpoints</a>)</div>
<div class="line"><a id="l00316" name="l00316"></a><span class="lineno">  316</span>  {</div>
<div class="line"><a id="l00317" name="l00317"></a><span class="lineno">  317</span>    (*os) &lt;&lt; <span class="stringliteral">&quot;  [#&quot;</span> &lt;&lt; idx &lt;&lt; <span class="stringliteral">&quot;| &quot;</span> &lt;&lt; <a class="code hl_function" href="classflow_1_1perf_1_1Checkpointing__timer.html#a9e6078df059d5626ab5774f0a33fbad7">checkpoint</a> &lt;&lt; <span class="charliteral">&#39;]&#39;</span>;</div>
<div class="line"><a id="l00318" name="l00318"></a><span class="lineno">  318</span>    <span class="keywordflow">if</span> ((idx + 1) != <a class="code hl_variable" href="classflow_1_1perf_1_1Checkpointing__timer.html#a9d064df3b46dd7e629f4d836a9803750">m_checkpoints</a>.size())</div>
<div class="line"><a id="l00319" name="l00319"></a><span class="lineno">  319</span>    {</div>
<div class="line"><a id="l00320" name="l00320"></a><span class="lineno">  320</span>      (*os) &lt;&lt; <span class="charliteral">&#39;\n&#39;</span>; <span class="comment">// Else no newline as promised.</span></div>
<div class="line"><a id="l00321" name="l00321"></a><span class="lineno">  321</span>    }</div>
<div class="line"><a id="l00322" name="l00322"></a><span class="lineno">  322</span>    ++idx;</div>
<div class="line"><a id="l00323" name="l00323"></a><span class="lineno">  323</span>  }</div>
<div class="line"><a id="l00324" name="l00324"></a><span class="lineno">  324</span> </div>
<div class="line"><a id="l00325" name="l00325"></a><span class="lineno">  325</span>  <span class="keywordflow">if</span> (<a class="code hl_variable" href="classflow_1_1perf_1_1Checkpointing__timer.html#a9d064df3b46dd7e629f4d836a9803750">m_checkpoints</a>.size() == 1)</div>
<div class="line"><a id="l00326" name="l00326"></a><span class="lineno">  326</span>  {</div>
<div class="line"><a id="l00327" name="l00327"></a><span class="lineno">  327</span>    <span class="keywordflow">return</span>; <span class="comment">// No point, as total = the one checkpoint (a fairly common use case).</span></div>
<div class="line"><a id="l00328" name="l00328"></a><span class="lineno">  328</span>  }</div>
<div class="line"><a id="l00329" name="l00329"></a><span class="lineno">  329</span>  <span class="comment">// else</span></div>
<div class="line"><a id="l00330" name="l00330"></a><span class="lineno">  330</span> </div>
<div class="line"><a id="l00331" name="l00331"></a><span class="lineno">  331</span>  (*os) &lt;&lt; <span class="stringliteral">&quot;\n&quot;</span></div>
<div class="line"><a id="l00332" name="l00332"></a><span class="lineno">  332</span>           <span class="stringliteral">&quot;Total duration: [&quot;</span> &lt;&lt; <a class="code hl_function" href="classflow_1_1perf_1_1Checkpointing__timer.html#afeb1faa0e4962dacf9b6a134191a4933">since_start</a>() &lt;&lt; <span class="stringliteral">&quot;]&quot;</span>; <span class="comment">// No newline as promised.</span></div>
<div class="line"><a id="l00333" name="l00333"></a><span class="lineno">  333</span>}</div>
<div class="line"><a id="l00334" name="l00334"></a><span class="lineno">  334</span> </div>
<div class="line"><a id="l00335" name="l00335"></a><span class="lineno"><a class="line" href="structflow_1_1perf_1_1Checkpointing__timer_1_1Checkpoint.html#a5bb3a068357516df714c4266ec5c3df4">  335</a></span>std::ostream&amp; <a class="code hl_function" href="namespaceflow_1_1perf.html#a5bb3a068357516df714c4266ec5c3df4">operator&lt;&lt;</a>(std::ostream&amp; os, <span class="keyword">const</span> <a class="code hl_struct" href="structflow_1_1perf_1_1Checkpointing__timer_1_1Checkpoint.html">Checkpointing_timer::Checkpoint</a>&amp; checkpoint)</div>
<div class="line"><a id="l00336" name="l00336"></a><span class="lineno">  336</span>{</div>
<div class="line"><a id="l00337" name="l00337"></a><span class="lineno">  337</span>  <span class="keywordflow">return</span> os &lt;&lt; checkpoint.<a class="code hl_variable" href="structflow_1_1perf_1_1Checkpointing__timer_1_1Checkpoint.html#a6c0363e3e1ef330464b87363e4287758">m_name</a> &lt;&lt; <span class="stringliteral">&quot;&lt;-[&quot;</span> &lt;&lt; checkpoint.<a class="code hl_variable" href="structflow_1_1perf_1_1Checkpointing__timer_1_1Checkpoint.html#aacbec1a1e5600aeac4e7ca876060552f">m_since_last</a> &lt;&lt; <span class="charliteral">&#39;]&#39;</span>;</div>
<div class="line"><a id="l00338" name="l00338"></a><span class="lineno">  338</span>}</div>
<div class="line"><a id="l00339" name="l00339"></a><span class="lineno">  339</span> </div>
<div class="line"><a id="l00340" name="l00340"></a><span class="lineno"><a class="line" href="classflow_1_1perf_1_1Checkpointing__timer.html#a6d5b7cbbe0ec5133299f97148ef3eaa0">  340</a></span>std::ostream&amp; <a class="code hl_function" href="namespaceflow_1_1perf.html#a5bb3a068357516df714c4266ec5c3df4">operator&lt;&lt;</a>(std::ostream&amp; os, <span class="keyword">const</span> <a class="code hl_class" href="classflow_1_1perf_1_1Checkpointing__timer.html">Checkpointing_timer</a>&amp; timer)</div>
<div class="line"><a id="l00341" name="l00341"></a><span class="lineno">  341</span>{</div>
<div class="line"><a id="l00342" name="l00342"></a><span class="lineno">  342</span>  timer.<a class="code hl_function" href="classflow_1_1perf_1_1Checkpointing__timer.html#a07204b9119b94bc10d53a8ba15c44797">output</a>(&amp;os);</div>
<div class="line"><a id="l00343" name="l00343"></a><span class="lineno">  343</span>  <span class="keywordflow">return</span> os;</div>
<div class="line"><a id="l00344" name="l00344"></a><span class="lineno">  344</span>}</div>
<div class="line"><a id="l00345" name="l00345"></a><span class="lineno">  345</span> </div>
<div class="line"><a id="l00346" name="l00346"></a><span class="lineno">  346</span><span class="comment">// Checkpointing_timer::Aggregator implementations.</span></div>
<div class="line"><a id="l00347" name="l00347"></a><span class="lineno">  347</span> </div>
<div class="line"><a id="l00348" name="l00348"></a><span class="lineno"><a class="line" href="classflow_1_1perf_1_1Checkpointing__timer_1_1Aggregator.html#adbe0250e405ae2be4b434f5e2cb76f7a">  348</a></span><a class="code hl_function" href="classflow_1_1perf_1_1Checkpointing__timer_1_1Aggregator.html#adbe0250e405ae2be4b434f5e2cb76f7a">Checkpointing_timer::Aggregator::Aggregator</a>(<a class="code hl_class" href="classflow_1_1log_1_1Logger.html">flow::log::Logger</a>* logger_ptr,</div>
<div class="line"><a id="l00349" name="l00349"></a><span class="lineno">  349</span>                                            std::string&amp;&amp; name_moved, <span class="keywordtype">size_t</span> max_n_samples) :</div>
<div class="line"><a id="l00350" name="l00350"></a><span class="lineno">  350</span>  log::Log_context(logger_ptr, <a class="code hl_enumeration" href="namespaceflow.html#a3938730ab4b89daf13d027a5f620e7ce">Flow_log_component</a>::S_PERF),</div>
<div class="line"><a id="l00351" name="l00351"></a><span class="lineno">  351</span>  m_name(std::move(name_moved))</div>
<div class="line"><a id="l00352" name="l00352"></a><span class="lineno">  352</span>{</div>
<div class="line"><a id="l00353" name="l00353"></a><span class="lineno">  353</span>  assert(max_n_samples != 0);</div>
<div class="line"><a id="l00354" name="l00354"></a><span class="lineno">  354</span>  <a class="code hl_variable" href="classflow_1_1perf_1_1Checkpointing__timer_1_1Aggregator.html#af1c4f46ce680b979e98a3e255c88d063">m_timers</a>.reserve(max_n_samples); <span class="comment">// Performance -- avoid reallocs.</span></div>
<div class="line"><a id="l00355" name="l00355"></a><span class="lineno">  355</span>}</div>
<div class="line"><a id="l00356" name="l00356"></a><span class="lineno">  356</span> </div>
<div class="line"><a id="l00357" name="l00357"></a><span class="lineno"><a class="line" href="classflow_1_1perf_1_1Checkpointing__timer_1_1Aggregator.html#a18bdb2f17039bcb82ddd4022a3a8340d">  357</a></span><span class="keywordtype">void</span> <a class="code hl_function" href="classflow_1_1perf_1_1Checkpointing__timer_1_1Aggregator.html#a18bdb2f17039bcb82ddd4022a3a8340d">Checkpointing_timer::Aggregator::aggregate</a>(<a class="code hl_typedef" href="namespaceflow_1_1perf.html#a09ba385403a0f347f283659a6e9d971b">Checkpointing_timer_ptr</a> timer_ptr)</div>
<div class="line"><a id="l00358" name="l00358"></a><span class="lineno">  358</span>{</div>
<div class="line"><a id="l00359" name="l00359"></a><span class="lineno">  359</span>  assert((m_timers.size() + 1) &lt;= m_timers.capacity()); <span class="comment">// Similarly to Checkpointing_timer::checkpoint()....</span></div>
<div class="line"><a id="l00360" name="l00360"></a><span class="lineno">  360</span>  m_timers.emplace_back(timer_ptr); <span class="comment">// Watch out for concurrency!</span></div>
<div class="line"><a id="l00361" name="l00361"></a><span class="lineno">  361</span> </div>
<div class="line"><a id="l00362" name="l00362"></a><span class="lineno">  362</span>  <a class="code hl_define" href="log_8hpp.html#affcf2e4c496ce3f42adf981669c623b8">FLOW_LOG_TRACE</a>(<span class="stringliteral">&quot;Aggregator [&quot;</span> &lt;&lt; <a class="code hl_variable" href="classflow_1_1perf_1_1Checkpointing__timer.html#a25981d44a91e1315bd92711d6e18a91b">m_name</a> &lt;&lt; <span class="stringliteral">&quot;]: Added Timer # [&quot;</span> &lt;&lt; (m_timers.size() - 1) &lt;&lt; <span class="stringliteral">&quot;] &quot;</span></div>
<div class="line"><a id="l00363" name="l00363"></a><span class="lineno">  363</span>                 <span class="stringliteral">&quot;named [&quot;</span> &lt;&lt; timer_ptr-&gt;m_name &lt;&lt; <span class="stringliteral">&quot;].&quot;</span>);</div>
<div class="line"><a id="l00364" name="l00364"></a><span class="lineno">  364</span>}</div>
<div class="line"><a id="l00365" name="l00365"></a><span class="lineno">  365</span> </div>
<div class="line"><a id="l00366" name="l00366"></a><span class="lineno"><a class="line" href="classflow_1_1perf_1_1Checkpointing__timer_1_1Aggregator.html#aeb9e86afbbf49865c6cce1ae7d2fc7a3">  366</a></span><span class="keywordtype">void</span> <a class="code hl_function" href="classflow_1_1perf_1_1Checkpointing__timer_1_1Aggregator.html#aeb9e86afbbf49865c6cce1ae7d2fc7a3">Checkpointing_timer::Aggregator::clear</a>()</div>
<div class="line"><a id="l00367" name="l00367"></a><span class="lineno">  367</span>{</div>
<div class="line"><a id="l00368" name="l00368"></a><span class="lineno">  368</span>  m_timers.clear(); <span class="comment">// Again, watch out for concurrency.</span></div>
<div class="line"><a id="l00369" name="l00369"></a><span class="lineno">  369</span>}</div>
<div class="line"><a id="l00370" name="l00370"></a><span class="lineno">  370</span> </div>
<div class="line"><a id="l00371" name="l00371"></a><span class="lineno"><a class="line" href="classflow_1_1perf_1_1Checkpointing__timer_1_1Aggregator.html#acbacf3b4842b77f542082e7a186f1434">  371</a></span><a class="code hl_typedef" href="namespaceflow_1_1perf.html#a09ba385403a0f347f283659a6e9d971b">Checkpointing_timer_ptr</a> <a class="code hl_function" href="classflow_1_1perf_1_1Checkpointing__timer_1_1Aggregator.html#acbacf3b4842b77f542082e7a186f1434">Checkpointing_timer::Aggregator::create_aggregated_result</a></div>
<div class="line"><a id="l00372" name="l00372"></a><span class="lineno">  372</span>                          (<a class="code hl_class" href="classflow_1_1log_1_1Logger.html">log::Logger</a>* alternate_logger_ptr_or_null, <span class="keywordtype">bool</span> info_log_result,</div>
<div class="line"><a id="l00373" name="l00373"></a><span class="lineno">  373</span>                           uint64_t mean_scale_or_zero)<span class="keyword"> const</span></div>
<div class="line"><a id="l00374" name="l00374"></a><span class="lineno">  374</span><span class="keyword"></span>{</div>
<div class="line"><a id="l00375" name="l00375"></a><span class="lineno">  375</span>  <span class="keyword">using </span>std::string;</div>
<div class="line"><a id="l00376" name="l00376"></a><span class="lineno">  376</span>  <span class="keyword">using </span>std::copy;</div>
<div class="line"><a id="l00377" name="l00377"></a><span class="lineno">  377</span> </div>
<div class="line"><a id="l00378" name="l00378"></a><span class="lineno">  378</span>  assert(!m_timers.empty());</div>
<div class="line"><a id="l00379" name="l00379"></a><span class="lineno">  379</span>  <span class="keyword">auto</span> model_timer = m_timers.front();</div>
<div class="line"><a id="l00380" name="l00380"></a><span class="lineno">  380</span> </div>
<div class="line"><a id="l00381" name="l00381"></a><span class="lineno">  381</span>  <span class="comment">// Construct the thing minimally and fill out the rest of the fields as the public ctor would, with special values.</span></div>
<div class="line"><a id="l00382" name="l00382"></a><span class="lineno">  382</span>  <a class="code hl_typedef" href="namespaceflow_1_1perf.html#a09ba385403a0f347f283659a6e9d971b">Checkpointing_timer_ptr</a> agg_timer(<span class="keyword">new</span> <a class="code hl_function" href="classflow_1_1perf_1_1Checkpointing__timer.html#aa9940d8e87883f9985ba18939f833db9">Checkpointing_timer</a>(<a class="code hl_function" href="classflow_1_1log_1_1Log__context.html#af4db395042b065b00398cd59845dcb4d">get_logger</a>(), <span class="keywordtype">string</span>(<a class="code hl_variable" href="classflow_1_1perf_1_1Checkpointing__timer.html#a25981d44a91e1315bd92711d6e18a91b">m_name</a>), model_timer-&gt;m_which_clocks));</div>
<div class="line"><a id="l00383" name="l00383"></a><span class="lineno">  383</span>  agg_timer-&gt;m_checkpoints.reserve(model_timer-&gt;m_checkpoints.size());</div>
<div class="line"><a id="l00384" name="l00384"></a><span class="lineno">  384</span>  <span class="comment">// m_start_when, m_last_checkpoint_when, and m_checkpoints itself are empty; we set them below.</span></div>
<div class="line"><a id="l00385" name="l00385"></a><span class="lineno">  385</span> </div>
<div class="line"><a id="l00386" name="l00386"></a><span class="lineno">  386</span>  <span class="keywordtype">bool</span> first_dur = <span class="keyword">true</span>;</div>
<div class="line"><a id="l00387" name="l00387"></a><span class="lineno">  387</span>  <a class="code hl_struct" href="structflow_1_1perf_1_1Duration__set.html">Duration_set</a> total_dur; <span class="comment">// Uninitialized!</span></div>
<div class="line"><a id="l00388" name="l00388"></a><span class="lineno">  388</span> </div>
<div class="line"><a id="l00389" name="l00389"></a><span class="lineno">  389</span>  <span class="comment">// Add it all up, making sure each timer&#39;s sequence of checkpoints is the same (names, etc.).</span></div>
<div class="line"><a id="l00390" name="l00390"></a><span class="lineno">  390</span>  <span class="keywordflow">for</span> (<span class="keyword">const</span> <span class="keyword">auto</span>&amp; timer : m_timers)</div>
<div class="line"><a id="l00391" name="l00391"></a><span class="lineno">  391</span>  {</div>
<div class="line"><a id="l00392" name="l00392"></a><span class="lineno">  392</span>    <span class="keywordflow">if</span> (timer != model_timer) <span class="comment">// Sanity-check as noted -- first on the timer at large, below on checkpoints.</span></div>
<div class="line"><a id="l00393" name="l00393"></a><span class="lineno">  393</span>    {</div>
<div class="line"><a id="l00394" name="l00394"></a><span class="lineno">  394</span>      assert(timer-&gt;m_which_clocks == model_timer-&gt;m_which_clocks);</div>
<div class="line"><a id="l00395" name="l00395"></a><span class="lineno">  395</span>      assert(timer-&gt;m_checkpoints.size() == model_timer-&gt;m_checkpoints.size());</div>
<div class="line"><a id="l00396" name="l00396"></a><span class="lineno">  396</span>    }</div>
<div class="line"><a id="l00397" name="l00397"></a><span class="lineno">  397</span> </div>
<div class="line"><a id="l00398" name="l00398"></a><span class="lineno">  398</span>    <span class="keywordtype">size_t</span> idx_checkpoints = 0; <span class="comment">// So we can walk along model_timer-&gt;m_checkpoints in parallel.</span></div>
<div class="line"><a id="l00399" name="l00399"></a><span class="lineno">  399</span>    <span class="keywordflow">for</span> (<span class="keyword">const</span> <span class="keyword">auto</span>&amp; <a class="code hl_function" href="classflow_1_1perf_1_1Checkpointing__timer.html#a9e6078df059d5626ab5774f0a33fbad7">checkpoint</a> : timer-&gt;m_checkpoints)</div>
<div class="line"><a id="l00400" name="l00400"></a><span class="lineno">  400</span>    {</div>
<div class="line"><a id="l00401" name="l00401"></a><span class="lineno">  401</span>      <span class="keywordflow">if</span> (timer == model_timer)</div>
<div class="line"><a id="l00402" name="l00402"></a><span class="lineno">  402</span>      {</div>
<div class="line"><a id="l00403" name="l00403"></a><span class="lineno">  403</span>        <span class="comment">// First timer being examined.  Start up this *result* checkpt to equal it.  Later, we will += to it.</span></div>
<div class="line"><a id="l00404" name="l00404"></a><span class="lineno">  404</span>        agg_timer-&gt;m_checkpoints.emplace_back(<a class="code hl_function" href="classflow_1_1perf_1_1Checkpointing__timer.html#a9e6078df059d5626ab5774f0a33fbad7">checkpoint</a>);</div>
<div class="line"><a id="l00405" name="l00405"></a><span class="lineno">  405</span>      }</div>
<div class="line"><a id="l00406" name="l00406"></a><span class="lineno">  406</span>      <span class="keywordflow">else</span> <span class="comment">// if (timer != model_timer)</span></div>
<div class="line"><a id="l00407" name="l00407"></a><span class="lineno">  407</span>      {</div>
<div class="line"><a id="l00408" name="l00408"></a><span class="lineno">  408</span>        <span class="comment">// Sanity-check the checkpoints line up as noted.</span></div>
<div class="line"><a id="l00409" name="l00409"></a><span class="lineno">  409</span><span class="preprocessor">#ifndef NDEBUG</span></div>
<div class="line"><a id="l00410" name="l00410"></a><span class="lineno">  410</span>        <span class="keyword">const</span> <span class="keyword">auto</span>&amp; model_checkpoint = model_timer-&gt;m_checkpoints[idx_checkpoints];</div>
<div class="line"><a id="l00411" name="l00411"></a><span class="lineno">  411</span>        assert(<a class="code hl_function" href="classflow_1_1perf_1_1Checkpointing__timer.html#a9e6078df059d5626ab5774f0a33fbad7">checkpoint</a>.<a class="code hl_variable" href="structflow_1_1perf_1_1Checkpointing__timer_1_1Checkpoint.html#a6c0363e3e1ef330464b87363e4287758">m_name</a> == model_checkpoint.m_name);</div>
<div class="line"><a id="l00412" name="l00412"></a><span class="lineno">  412</span><span class="preprocessor">#endif</span></div>
<div class="line"><a id="l00413" name="l00413"></a><span class="lineno">  413</span>        <span class="comment">// Name is all set (and is consistent); aggregate in the durations from the agged timer&#39;s checkpoint.</span></div>
<div class="line"><a id="l00414" name="l00414"></a><span class="lineno">  414</span>        agg_timer-&gt;m_checkpoints[idx_checkpoints].m_since_last += <a class="code hl_function" href="classflow_1_1perf_1_1Checkpointing__timer.html#a9e6078df059d5626ab5774f0a33fbad7">checkpoint</a>.<a class="code hl_variable" href="structflow_1_1perf_1_1Checkpointing__timer_1_1Checkpoint.html#aacbec1a1e5600aeac4e7ca876060552f">m_since_last</a>;</div>
<div class="line"><a id="l00415" name="l00415"></a><span class="lineno">  415</span>      }</div>
<div class="line"><a id="l00416" name="l00416"></a><span class="lineno">  416</span> </div>
<div class="line"><a id="l00417" name="l00417"></a><span class="lineno">  417</span>      <span class="comment">// Add to or start the uber-sum.</span></div>
<div class="line"><a id="l00418" name="l00418"></a><span class="lineno">  418</span>      <span class="keywordflow">if</span> (first_dur)</div>
<div class="line"><a id="l00419" name="l00419"></a><span class="lineno">  419</span>      {</div>
<div class="line"><a id="l00420" name="l00420"></a><span class="lineno">  420</span>        first_dur = <span class="keyword">false</span>;</div>
<div class="line"><a id="l00421" name="l00421"></a><span class="lineno">  421</span>        total_dur = <a class="code hl_function" href="classflow_1_1perf_1_1Checkpointing__timer.html#a9e6078df059d5626ab5774f0a33fbad7">checkpoint</a>.<a class="code hl_variable" href="structflow_1_1perf_1_1Checkpointing__timer_1_1Checkpoint.html#aacbec1a1e5600aeac4e7ca876060552f">m_since_last</a>; <span class="comment">// Uninitialized right now =&gt; assign.</span></div>
<div class="line"><a id="l00422" name="l00422"></a><span class="lineno">  422</span>      }</div>
<div class="line"><a id="l00423" name="l00423"></a><span class="lineno">  423</span>      <span class="keywordflow">else</span></div>
<div class="line"><a id="l00424" name="l00424"></a><span class="lineno">  424</span>      {</div>
<div class="line"><a id="l00425" name="l00425"></a><span class="lineno">  425</span>        <span class="comment">// Initialized: sum.</span></div>
<div class="line"><a id="l00426" name="l00426"></a><span class="lineno">  426</span>        total_dur += <a class="code hl_function" href="classflow_1_1perf_1_1Checkpointing__timer.html#a9e6078df059d5626ab5774f0a33fbad7">checkpoint</a>.<a class="code hl_variable" href="structflow_1_1perf_1_1Checkpointing__timer_1_1Checkpoint.html#aacbec1a1e5600aeac4e7ca876060552f">m_since_last</a>;</div>
<div class="line"><a id="l00427" name="l00427"></a><span class="lineno">  427</span>      }</div>
<div class="line"><a id="l00428" name="l00428"></a><span class="lineno">  428</span> </div>
<div class="line"><a id="l00429" name="l00429"></a><span class="lineno">  429</span>      ++idx_checkpoints;</div>
<div class="line"><a id="l00430" name="l00430"></a><span class="lineno">  430</span>    }</div>
<div class="line"><a id="l00431" name="l00431"></a><span class="lineno">  431</span>  } <span class="comment">// for (timer : m_timers)</span></div>
<div class="line"><a id="l00432" name="l00432"></a><span class="lineno">  432</span> </div>
<div class="line"><a id="l00433" name="l00433"></a><span class="lineno">  433</span>  <span class="comment">/* Note it&#39;s currently an uninitialized array; set it to 0s.  Then the below calls will yield appropriate</span></div>
<div class="line"><a id="l00434" name="l00434"></a><span class="lineno">  434</span><span class="comment">   * agg_timer-&gt;since_start() result.  This is a bit of a hack, perhaps, but since_start() is not an lvalue, and this</span></div>
<div class="line"><a id="l00435" name="l00435"></a><span class="lineno">  435</span><span class="comment">   * does work given that fact. */</span></div>
<div class="line"><a id="l00436" name="l00436"></a><span class="lineno">  436</span>  agg_timer-&gt;m_start_when.<a class="code hl_variable" href="structflow_1_1perf_1_1Duration__set.html#ae7d89b9e16f45dc59b27092e0496ce4f">m_values</a>.fill(<a class="code hl_typedef" href="namespaceflow_1_1perf.html#ace5f154155a7d9d5c112c1a83aa04fb5">Time_pt</a>());</div>
<div class="line"><a id="l00437" name="l00437"></a><span class="lineno">  437</span>  agg_timer-&gt;m_last_checkpoint_when = agg_timer-&gt;m_start_when;</div>
<div class="line"><a id="l00438" name="l00438"></a><span class="lineno">  438</span>  agg_timer-&gt;m_last_checkpoint_when += total_dur;</div>
<div class="line"><a id="l00439" name="l00439"></a><span class="lineno">  439</span>  <span class="comment">// This is what we really wanted, but since_start() isn&#39;t an lvalue hence the above hackery.</span></div>
<div class="line"><a id="l00440" name="l00440"></a><span class="lineno">  440</span>  assert(agg_timer-&gt;since_start().m_values == total_dur.<a class="code hl_variable" href="structflow_1_1perf_1_1Duration__set.html#ae7d89b9e16f45dc59b27092e0496ce4f">m_values</a>);</div>
<div class="line"><a id="l00441" name="l00441"></a><span class="lineno">  441</span> </div>
<div class="line"><a id="l00442" name="l00442"></a><span class="lineno">  442</span>  <span class="keyword">const</span> <span class="keyword">auto</span> n_samples = m_timers.size();</div>
<div class="line"><a id="l00443" name="l00443"></a><span class="lineno">  443</span>  <span class="keyword">const</span> <span class="keywordtype">bool</span> mean_aggregation = mean_scale_or_zero != 0;</div>
<div class="line"><a id="l00444" name="l00444"></a><span class="lineno">  444</span> </div>
<div class="line"><a id="l00445" name="l00445"></a><span class="lineno">  445</span>  <span class="keywordflow">if</span> (mean_aggregation)</div>
<div class="line"><a id="l00446" name="l00446"></a><span class="lineno">  446</span>  {</div>
<div class="line"><a id="l00447" name="l00447"></a><span class="lineno">  447</span>    <a class="code hl_define" href="log_8hpp.html#affcf2e4c496ce3f42adf981669c623b8">FLOW_LOG_TRACE</a>(<span class="stringliteral">&quot;Returning aggregated-mean result timer [&quot;</span> &lt;&lt; <a class="code hl_variable" href="classflow_1_1perf_1_1Checkpointing__timer.html#a25981d44a91e1315bd92711d6e18a91b">m_name</a> &lt;&lt; <span class="stringliteral">&quot;] &quot;</span></div>
<div class="line"><a id="l00448" name="l00448"></a><span class="lineno">  448</span>                   <span class="stringliteral">&quot;with [&quot;</span> &lt;&lt; n_samples &lt;&lt; <span class="stringliteral">&quot;] samples &quot;</span></div>
<div class="line"><a id="l00449" name="l00449"></a><span class="lineno">  449</span>                   <span class="stringliteral">&quot;scaled by [&quot;</span> &lt;&lt; mean_scale_or_zero &lt;&lt; <span class="stringliteral">&quot;] samples.&quot;</span>);</div>
<div class="line"><a id="l00450" name="l00450"></a><span class="lineno">  450</span>    agg_timer-&gt;scale(mean_scale_or_zero, n_samples);</div>
<div class="line"><a id="l00451" name="l00451"></a><span class="lineno">  451</span>  }</div>
<div class="line"><a id="l00452" name="l00452"></a><span class="lineno">  452</span>  <span class="keywordflow">else</span></div>
<div class="line"><a id="l00453" name="l00453"></a><span class="lineno">  453</span>  {</div>
<div class="line"><a id="l00454" name="l00454"></a><span class="lineno">  454</span>    <a class="code hl_define" href="log_8hpp.html#affcf2e4c496ce3f42adf981669c623b8">FLOW_LOG_TRACE</a>(<span class="stringliteral">&quot;Returning aggregated-sum result timer [&quot;</span> &lt;&lt; <a class="code hl_variable" href="classflow_1_1perf_1_1Checkpointing__timer.html#a25981d44a91e1315bd92711d6e18a91b">m_name</a> &lt;&lt; <span class="stringliteral">&quot;] &quot;</span></div>
<div class="line"><a id="l00455" name="l00455"></a><span class="lineno">  455</span>                   <span class="stringliteral">&quot;with [&quot;</span> &lt;&lt; n_samples &lt;&lt; <span class="stringliteral">&quot;] samples.&quot;</span>);</div>
<div class="line"><a id="l00456" name="l00456"></a><span class="lineno">  456</span>  }</div>
<div class="line"><a id="l00457" name="l00457"></a><span class="lineno">  457</span> </div>
<div class="line"><a id="l00458" name="l00458"></a><span class="lineno">  458</span>  <span class="comment">/* This is typically the &quot;official&quot; way to log something user-friendly.</span></div>
<div class="line"><a id="l00459" name="l00459"></a><span class="lineno">  459</span><span class="comment">   * (Sometimes they may have prepared their own agg_timer; in which case they can call</span></div>
<div class="line"><a id="l00460" name="l00460"></a><span class="lineno">  460</span><span class="comment">   * log_aggregated_result_in_timer() [which is static] directly.  See Checkpointing_timer doc header. */</span></div>
<div class="line"><a id="l00461" name="l00461"></a><span class="lineno">  461</span>  <span class="keywordflow">if</span> (info_log_result)</div>
<div class="line"><a id="l00462" name="l00462"></a><span class="lineno">  462</span>  {</div>
<div class="line"><a id="l00463" name="l00463"></a><span class="lineno">  463</span>    log_aggregated_result_in_timer(alternate_logger_ptr_or_null ? alternate_logger_ptr_or_null : <a class="code hl_function" href="classflow_1_1log_1_1Log__context.html#af4db395042b065b00398cd59845dcb4d">get_logger</a>(),</div>
<div class="line"><a id="l00464" name="l00464"></a><span class="lineno">  464</span>                                   *agg_timer, n_samples, mean_scale_or_zero);</div>
<div class="line"><a id="l00465" name="l00465"></a><span class="lineno">  465</span>  }</div>
<div class="line"><a id="l00466" name="l00466"></a><span class="lineno">  466</span> </div>
<div class="line"><a id="l00467" name="l00467"></a><span class="lineno">  467</span>  <span class="keywordflow">return</span> agg_timer;</div>
<div class="line"><a id="l00468" name="l00468"></a><span class="lineno">  468</span>} <span class="comment">// Checkpointing_timer::Aggregator::create_aggregated_result()</span></div>
<div class="line"><a id="l00469" name="l00469"></a><span class="lineno">  469</span> </div>
<div class="line"><a id="l00470" name="l00470"></a><span class="lineno"><a class="line" href="classflow_1_1perf_1_1Checkpointing__timer_1_1Aggregator.html#abd543abbfae859ddc111741468f95125">  470</a></span><span class="keywordtype">void</span> <a class="code hl_function" href="classflow_1_1perf_1_1Checkpointing__timer_1_1Aggregator.html#abd543abbfae859ddc111741468f95125">Checkpointing_timer::Aggregator::log_aggregated_result_in_timer</a></div>
<div class="line"><a id="l00471" name="l00471"></a><span class="lineno">  471</span>       (<a class="code hl_class" href="classflow_1_1log_1_1Logger.html">log::Logger</a>* logger_ptr,</div>
<div class="line"><a id="l00472" name="l00472"></a><span class="lineno">  472</span>        <span class="keyword">const</span> <a class="code hl_class" href="classflow_1_1perf_1_1Checkpointing__timer.html">Checkpointing_timer</a>&amp; agg_timer, <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> n_samples,</div>
<div class="line"><a id="l00473" name="l00473"></a><span class="lineno">  473</span>        uint64_t mean_scale_or_zero) <span class="comment">// Static.</span></div>
<div class="line"><a id="l00474" name="l00474"></a><span class="lineno">  474</span>{</div>
<div class="line"><a id="l00475" name="l00475"></a><span class="lineno">  475</span>  <span class="keyword">using </span>std::array;</div>
<div class="line"><a id="l00476" name="l00476"></a><span class="lineno">  476</span>  <span class="keyword">using </span><a class="code hl_class" href="classflow_1_1log_1_1Logger.html">flow::log::Logger</a>;</div>
<div class="line"><a id="l00477" name="l00477"></a><span class="lineno">  477</span> </div>
<div class="line"><a id="l00478" name="l00478"></a><span class="lineno">  478</span>  <a class="code hl_define" href="log_8hpp.html#ae4b5d4fdd2eb052615620879dd74af95">FLOW_LOG_SET_CONTEXT</a>(logger_ptr, Flow_log_component::S_PERF);</div>
<div class="line"><a id="l00479" name="l00479"></a><span class="lineno">  479</span>  <span class="keyword">const</span> <span class="keywordtype">bool</span> mean_aggregation = mean_scale_or_zero != 0;</div>
<div class="line"><a id="l00480" name="l00480"></a><span class="lineno">  480</span> </div>
<div class="line"><a id="l00481" name="l00481"></a><span class="lineno">  481</span>  <span class="comment">// Show one type (numerically speaking) of view into the aggregated results.</span></div>
<div class="line"><a id="l00482" name="l00482"></a><span class="lineno">  482</span>  <span class="keywordflow">if</span> (!mean_aggregation)</div>
<div class="line"><a id="l00483" name="l00483"></a><span class="lineno">  483</span>  {</div>
<div class="line"><a id="l00484" name="l00484"></a><span class="lineno">  484</span>    <a class="code hl_define" href="log_8hpp.html#a325fdd4b5cf0be49b37d3b7b7c29070d">FLOW_LOG_INFO</a>(<span class="stringliteral">&quot;Aggregator [&quot;</span> &lt;&lt; agg_timer.<a class="code hl_variable" href="classflow_1_1perf_1_1Checkpointing__timer.html#a25981d44a91e1315bd92711d6e18a91b">m_name</a> &lt;&lt; <span class="stringliteral">&quot;]: &quot;</span></div>
<div class="line"><a id="l00485" name="l00485"></a><span class="lineno">  485</span>                  <span class="stringliteral">&quot;Collated timing result from [&quot;</span> &lt;&lt; n_samples &lt;&lt; <span class="stringliteral">&quot;] samples: &quot;</span></div>
<div class="line"><a id="l00486" name="l00486"></a><span class="lineno">  486</span>                  <span class="stringliteral">&quot;SUM: [\n&quot;</span> &lt;&lt; agg_timer &lt;&lt; <span class="stringliteral">&quot;\n].&quot;</span>);</div>
<div class="line"><a id="l00487" name="l00487"></a><span class="lineno">  487</span>  }</div>
<div class="line"><a id="l00488" name="l00488"></a><span class="lineno">  488</span>  <span class="keywordflow">else</span> <span class="comment">// if (mean_aggregation)</span></div>
<div class="line"><a id="l00489" name="l00489"></a><span class="lineno">  489</span>  {</div>
<div class="line"><a id="l00490" name="l00490"></a><span class="lineno">  490</span>    <span class="keywordflow">if</span> (mean_scale_or_zero == 1)</div>
<div class="line"><a id="l00491" name="l00491"></a><span class="lineno">  491</span>    {</div>
<div class="line"><a id="l00492" name="l00492"></a><span class="lineno">  492</span>      <a class="code hl_define" href="log_8hpp.html#a325fdd4b5cf0be49b37d3b7b7c29070d">FLOW_LOG_INFO</a>(<span class="stringliteral">&quot;Aggregator [&quot;</span> &lt;&lt; agg_timer.<a class="code hl_variable" href="classflow_1_1perf_1_1Checkpointing__timer.html#a25981d44a91e1315bd92711d6e18a91b">m_name</a> &lt;&lt; <span class="stringliteral">&quot;]: &quot;</span></div>
<div class="line"><a id="l00493" name="l00493"></a><span class="lineno">  493</span>                    <span class="stringliteral">&quot;Collated timing result from [&quot;</span> &lt;&lt; n_samples &lt;&lt; <span class="stringliteral">&quot;] samples: &quot;</span></div>
<div class="line"><a id="l00494" name="l00494"></a><span class="lineno">  494</span>                    <span class="stringliteral">&quot;MEAN: [\n&quot;</span> &lt;&lt; agg_timer &lt;&lt; <span class="stringliteral">&quot;\n].&quot;</span>);</div>
<div class="line"><a id="l00495" name="l00495"></a><span class="lineno">  495</span>    }</div>
<div class="line"><a id="l00496" name="l00496"></a><span class="lineno">  496</span>    <span class="keywordflow">else</span> <span class="comment">// if (mean_scale_or_zero != 1)</span></div>
<div class="line"><a id="l00497" name="l00497"></a><span class="lineno">  497</span>    {</div>
<div class="line"><a id="l00498" name="l00498"></a><span class="lineno">  498</span>      assert(mean_scale_or_zero != 1);</div>
<div class="line"><a id="l00499" name="l00499"></a><span class="lineno">  499</span>      <a class="code hl_define" href="log_8hpp.html#a325fdd4b5cf0be49b37d3b7b7c29070d">FLOW_LOG_INFO</a>(<span class="stringliteral">&quot;Aggregator [&quot;</span> &lt;&lt; agg_timer.<a class="code hl_variable" href="classflow_1_1perf_1_1Checkpointing__timer.html#a25981d44a91e1315bd92711d6e18a91b">m_name</a> &lt;&lt; <span class="stringliteral">&quot;]: &quot;</span></div>
<div class="line"><a id="l00500" name="l00500"></a><span class="lineno">  500</span>                    <span class="stringliteral">&quot;Collated timing result from [&quot;</span> &lt;&lt; n_samples &lt;&lt; <span class="stringliteral">&quot;] samples: &quot;</span></div>
<div class="line"><a id="l00501" name="l00501"></a><span class="lineno">  501</span>                    <span class="stringliteral">&quot;SCALED-MEAN per [&quot;</span> &lt;&lt; mean_scale_or_zero &lt;&lt; <span class="stringliteral">&quot;] samples: [\n&quot;</span> &lt;&lt; agg_timer &lt;&lt; <span class="stringliteral">&quot;\n].&quot;</span>);</div>
<div class="line"><a id="l00502" name="l00502"></a><span class="lineno">  502</span>    }</div>
<div class="line"><a id="l00503" name="l00503"></a><span class="lineno">  503</span>  }</div>
<div class="line"><a id="l00504" name="l00504"></a><span class="lineno">  504</span>} <span class="comment">// Checkpointing_timer::Aggregator::log_aggregated_result_in_timer()</span></div>
<div class="line"><a id="l00505" name="l00505"></a><span class="lineno">  505</span> </div>
<div class="line"><a id="l00506" name="l00506"></a><span class="lineno"><a class="line" href="classflow_1_1perf_1_1Checkpointing__timer_1_1Aggregator.html#a29c66da23a48bdb5096bf2f206f5cae4">  506</a></span><span class="keywordtype">void</span> <a class="code hl_function" href="classflow_1_1perf_1_1Checkpointing__timer_1_1Aggregator.html#a29c66da23a48bdb5096bf2f206f5cae4">Checkpointing_timer::Aggregator::log_aggregated_results</a>(<a class="code hl_class" href="classflow_1_1log_1_1Logger.html">log::Logger</a>* alternate_logger_ptr_or_null,</div>
<div class="line"><a id="l00507" name="l00507"></a><span class="lineno">  507</span>                                                             <span class="keywordtype">bool</span> show_sum, <span class="keywordtype">bool</span> show_mean,</div>
<div class="line"><a id="l00508" name="l00508"></a><span class="lineno">  508</span>                                                             uint64_t mean_scale_or_zero)<span class="keyword"> const</span></div>
<div class="line"><a id="l00509" name="l00509"></a><span class="lineno">  509</span><span class="keyword"></span>{</div>
<div class="line"><a id="l00510" name="l00510"></a><span class="lineno">  510</span>  <a class="code hl_define" href="log_8hpp.html#a325fdd4b5cf0be49b37d3b7b7c29070d">FLOW_LOG_INFO</a>(<span class="stringliteral">&quot;Aggregation completed earlier.  Collating aggregated timing data; logging here/elsewhere:&quot;</span>);</div>
<div class="line"><a id="l00511" name="l00511"></a><span class="lineno">  511</span> </div>
<div class="line"><a id="l00512" name="l00512"></a><span class="lineno">  512</span>  <span class="comment">// Show each type (numerically speaking) of view into the aggregated results.</span></div>
<div class="line"><a id="l00513" name="l00513"></a><span class="lineno">  513</span> </div>
<div class="line"><a id="l00514" name="l00514"></a><span class="lineno">  514</span>  <span class="keywordflow">if</span> ((mean_scale_or_zero == 1) &amp;&amp; show_mean)</div>
<div class="line"><a id="l00515" name="l00515"></a><span class="lineno">  515</span>  {</div>
<div class="line"><a id="l00516" name="l00516"></a><span class="lineno">  516</span>    <span class="comment">/* If we&#39;re going to show MEAN anyway, and SCALED-MEAN&#39;s specified scale is the denegerate 1, then</span></div>
<div class="line"><a id="l00517" name="l00517"></a><span class="lineno">  517</span><span class="comment">     * pretend they didn&#39;t enabled SCALED-MEAN output in the first place.  It would show the same numbers anyway --</span></div>
<div class="line"><a id="l00518" name="l00518"></a><span class="lineno">  518</span><span class="comment">     * twice; so just do it once. */</span></div>
<div class="line"><a id="l00519" name="l00519"></a><span class="lineno">  519</span>    mean_scale_or_zero = 0;</div>
<div class="line"><a id="l00520" name="l00520"></a><span class="lineno">  520</span>  }</div>
<div class="line"><a id="l00521" name="l00521"></a><span class="lineno">  521</span> </div>
<div class="line"><a id="l00522" name="l00522"></a><span class="lineno">  522</span>  <span class="comment">// First `true` triggers actual logging; beyond that we ignore returned timer.</span></div>
<div class="line"><a id="l00523" name="l00523"></a><span class="lineno">  523</span>  <span class="keywordflow">if</span> (show_sum)</div>
<div class="line"><a id="l00524" name="l00524"></a><span class="lineno">  524</span>  {</div>
<div class="line"><a id="l00525" name="l00525"></a><span class="lineno">  525</span>    create_aggregated_result(alternate_logger_ptr_or_null, <span class="keyword">true</span>, 0); <span class="comment">// Log sum.</span></div>
<div class="line"><a id="l00526" name="l00526"></a><span class="lineno">  526</span>  }</div>
<div class="line"><a id="l00527" name="l00527"></a><span class="lineno">  527</span>  <span class="keywordflow">if</span> (show_mean)</div>
<div class="line"><a id="l00528" name="l00528"></a><span class="lineno">  528</span>  {</div>
<div class="line"><a id="l00529" name="l00529"></a><span class="lineno">  529</span>    create_aggregated_result(alternate_logger_ptr_or_null, <span class="keyword">true</span>, 1); <span class="comment">// Ditto for simple mean.</span></div>
<div class="line"><a id="l00530" name="l00530"></a><span class="lineno">  530</span>  }</div>
<div class="line"><a id="l00531" name="l00531"></a><span class="lineno">  531</span>  <span class="keywordflow">if</span> (mean_scale_or_zero != 0)</div>
<div class="line"><a id="l00532" name="l00532"></a><span class="lineno">  532</span>  {</div>
<div class="line"><a id="l00533" name="l00533"></a><span class="lineno">  533</span>    create_aggregated_result(alternate_logger_ptr_or_null, <span class="keyword">true</span>, mean_scale_or_zero); <span class="comment">// Ditto for scaled mean.</span></div>
<div class="line"><a id="l00534" name="l00534"></a><span class="lineno">  534</span>  }</div>
<div class="line"><a id="l00535" name="l00535"></a><span class="lineno">  535</span>} <span class="comment">// Checkpointing_timer::Aggregator::log_aggregated_results()</span></div>
<div class="line"><a id="l00536" name="l00536"></a><span class="lineno">  536</span> </div>
<div class="line"><a id="l00537" name="l00537"></a><span class="lineno">  537</span>} <span class="comment">// namespace flow::perf</span></div>
<div class="ttc" id="acheckpt__timer_8hpp_html"><div class="ttname"><a href="checkpt__timer_8hpp.html">checkpt_timer.hpp</a></div></div>
<div class="ttc" id="aclassflow_1_1log_1_1Log__context_html_a8a5fef42dc2cedf3c0d1a6e83beb2948"><div class="ttname"><a href="classflow_1_1log_1_1Log__context.html#a8a5fef42dc2cedf3c0d1a6e83beb2948">flow::log::Log_context::get_log_component</a></div><div class="ttdeci">const Component &amp; get_log_component() const</div><div class="ttdoc">Returns reference to the stored Component object, particularly as many FLOW_LOG_*() macros expect.</div><div class="ttdef"><b>Definition:</b> <a href="log_8cpp_source.html#l00222">log.cpp:222</a></div></div>
<div class="ttc" id="aclassflow_1_1log_1_1Log__context_html_af4db395042b065b00398cd59845dcb4d"><div class="ttname"><a href="classflow_1_1log_1_1Log__context.html#af4db395042b065b00398cd59845dcb4d">flow::log::Log_context::get_logger</a></div><div class="ttdeci">Logger * get_logger() const</div><div class="ttdoc">Returns the stored Logger pointer, particularly as many FLOW_LOG_*() macros expect.</div><div class="ttdef"><b>Definition:</b> <a href="log_8cpp_source.html#l00217">log.cpp:217</a></div></div>
<div class="ttc" id="aclassflow_1_1log_1_1Logger_html"><div class="ttname"><a href="classflow_1_1log_1_1Logger.html">flow::log::Logger</a></div><div class="ttdoc">Interface that the user should implement, passing the implementing Logger into logging classes (Flow'...</div><div class="ttdef"><b>Definition:</b> <a href="log_8hpp_source.html#l01280">log.hpp:1284</a></div></div>
<div class="ttc" id="aclassflow_1_1log_1_1Logger_html_ac8a2e7a33fe3fbc0c29ead62ed98c022"><div class="ttname"><a href="classflow_1_1log_1_1Logger.html#ac8a2e7a33fe3fbc0c29ead62ed98c022">flow::log::Logger::should_log</a></div><div class="ttdeci">virtual bool should_log(Sev sev, const Component &amp;component) const =0</div><div class="ttdoc">Given attributes of a hypothetical message that would be logged, return true if that message should b...</div></div>
<div class="ttc" id="aclassflow_1_1perf_1_1Checkpointing__timer_1_1Aggregator_html_a18bdb2f17039bcb82ddd4022a3a8340d"><div class="ttname"><a href="classflow_1_1perf_1_1Checkpointing__timer_1_1Aggregator.html#a18bdb2f17039bcb82ddd4022a3a8340d">flow::perf::Checkpointing_timer::Aggregator::aggregate</a></div><div class="ttdeci">void aggregate(Checkpointing_timer_ptr timer_ptr)</div><div class="ttdoc">Register given Checkpointing_timer for aggregated results.</div><div class="ttdef"><b>Definition:</b> <a href="checkpt__timer_8cpp_source.html#l00357">checkpt_timer.cpp:357</a></div></div>
<div class="ttc" id="aclassflow_1_1perf_1_1Checkpointing__timer_1_1Aggregator_html_a29c66da23a48bdb5096bf2f206f5cae4"><div class="ttname"><a href="classflow_1_1perf_1_1Checkpointing__timer_1_1Aggregator.html#a29c66da23a48bdb5096bf2f206f5cae4">flow::perf::Checkpointing_timer::Aggregator::log_aggregated_results</a></div><div class="ttdeci">void log_aggregated_results(log::Logger *alternate_logger_ptr_or_null, bool show_sum, bool show_mean, uint64_t mean_scale_or_zero) const</div><div class="ttdoc">Called after the final Checkpointing_timer has finished (final checkpoint() call) and been aggregate(...</div><div class="ttdef"><b>Definition:</b> <a href="checkpt__timer_8cpp_source.html#l00506">checkpt_timer.cpp:506</a></div></div>
<div class="ttc" id="aclassflow_1_1perf_1_1Checkpointing__timer_1_1Aggregator_html_abd543abbfae859ddc111741468f95125"><div class="ttname"><a href="classflow_1_1perf_1_1Checkpointing__timer_1_1Aggregator.html#abd543abbfae859ddc111741468f95125">flow::perf::Checkpointing_timer::Aggregator::log_aggregated_result_in_timer</a></div><div class="ttdeci">static void log_aggregated_result_in_timer(log::Logger *logger_ptr, const Checkpointing_timer &amp;agg_timer, unsigned int n_samples, uint64_t mean_scale_or_zero=1)</div><div class="ttdoc">Given an aggregated-result Checkpointing_timer (as if returned by create_aggregated_result()) logs th...</div><div class="ttdef"><b>Definition:</b> <a href="checkpt__timer_8cpp_source.html#l00470">checkpt_timer.cpp:471</a></div></div>
<div class="ttc" id="aclassflow_1_1perf_1_1Checkpointing__timer_1_1Aggregator_html_acbacf3b4842b77f542082e7a186f1434"><div class="ttname"><a href="classflow_1_1perf_1_1Checkpointing__timer_1_1Aggregator.html#acbacf3b4842b77f542082e7a186f1434">flow::perf::Checkpointing_timer::Aggregator::create_aggregated_result</a></div><div class="ttdeci">Checkpointing_timer_ptr create_aggregated_result(log::Logger *alternate_logger_ptr_or_null, bool info_log_result, uint64_t mean_scale_or_zero=1) const</div><div class="ttdoc">Provides programmatic access to the aggregation result that would be logged by log_aggregated_results...</div><div class="ttdef"><b>Definition:</b> <a href="checkpt__timer_8cpp_source.html#l00371">checkpt_timer.cpp:372</a></div></div>
<div class="ttc" id="aclassflow_1_1perf_1_1Checkpointing__timer_1_1Aggregator_html_adbe0250e405ae2be4b434f5e2cb76f7a"><div class="ttname"><a href="classflow_1_1perf_1_1Checkpointing__timer_1_1Aggregator.html#adbe0250e405ae2be4b434f5e2cb76f7a">flow::perf::Checkpointing_timer::Aggregator::Aggregator</a></div><div class="ttdeci">Aggregator(log::Logger *logger_ptr, std::string &amp;&amp;name_moved, size_t max_n_samples)</div><div class="ttdoc">Constructs a new, empty aggregator.</div><div class="ttdef"><b>Definition:</b> <a href="checkpt__timer_8cpp_source.html#l00348">checkpt_timer.cpp:348</a></div></div>
<div class="ttc" id="aclassflow_1_1perf_1_1Checkpointing__timer_1_1Aggregator_html_aeb9e86afbbf49865c6cce1ae7d2fc7a3"><div class="ttname"><a href="classflow_1_1perf_1_1Checkpointing__timer_1_1Aggregator.html#aeb9e86afbbf49865c6cce1ae7d2fc7a3">flow::perf::Checkpointing_timer::Aggregator::clear</a></div><div class="ttdeci">void clear()</div><div class="ttdoc">Act as if aggregate() has never been called since construction.</div><div class="ttdef"><b>Definition:</b> <a href="checkpt__timer_8cpp_source.html#l00366">checkpt_timer.cpp:366</a></div></div>
<div class="ttc" id="aclassflow_1_1perf_1_1Checkpointing__timer_1_1Aggregator_html_af1c4f46ce680b979e98a3e255c88d063"><div class="ttname"><a href="classflow_1_1perf_1_1Checkpointing__timer_1_1Aggregator.html#af1c4f46ce680b979e98a3e255c88d063">flow::perf::Checkpointing_timer::Aggregator::m_timers</a></div><div class="ttdeci">std::vector&lt; Checkpointing_timer_ptr &gt; m_timers</div><div class="ttdoc">The ref-counted pointers to source timers passed to aggregate() in that order.</div><div class="ttdef"><b>Definition:</b> <a href="checkpt__timer_8hpp_source.html#l00713">checkpt_timer.hpp:713</a></div></div>
<div class="ttc" id="aclassflow_1_1perf_1_1Checkpointing__timer_html"><div class="ttname"><a href="classflow_1_1perf_1_1Checkpointing__timer.html">flow::perf::Checkpointing_timer</a></div><div class="ttdoc">The central class in the perf Flow module, this efficiently times the user's operation,...</div><div class="ttdef"><b>Definition:</b> <a href="checkpt__timer_8hpp_source.html#l00186">checkpt_timer.hpp:188</a></div></div>
<div class="ttc" id="aclassflow_1_1perf_1_1Checkpointing__timer_html_a07204b9119b94bc10d53a8ba15c44797"><div class="ttname"><a href="classflow_1_1perf_1_1Checkpointing__timer.html#a07204b9119b94bc10d53a8ba15c44797">flow::perf::Checkpointing_timer::output</a></div><div class="ttdeci">void output(std::ostream *os) const</div><div class="ttdoc">Equivalent to (*os) &lt;&lt; (*this).</div><div class="ttdef"><b>Definition:</b> <a href="checkpt__timer_8cpp_source.html#l00304">checkpt_timer.cpp:304</a></div></div>
<div class="ttc" id="aclassflow_1_1perf_1_1Checkpointing__timer_html_a1f03d654924a3724e1f051c119f3767b"><div class="ttname"><a href="classflow_1_1perf_1_1Checkpointing__timer.html#a1f03d654924a3724e1f051c119f3767b">flow::perf::Checkpointing_timer::checkpoints</a></div><div class="ttdeci">const std::vector&lt; Checkpoint &gt; &amp; checkpoints() const</div><div class="ttdoc">Returns the checkpoints recorded so far.</div><div class="ttdef"><b>Definition:</b> <a href="checkpt__timer_8cpp_source.html#l00299">checkpt_timer.cpp:299</a></div></div>
<div class="ttc" id="aclassflow_1_1perf_1_1Checkpointing__timer_html_a25981d44a91e1315bd92711d6e18a91b"><div class="ttname"><a href="classflow_1_1perf_1_1Checkpointing__timer.html#a25981d44a91e1315bd92711d6e18a91b">flow::perf::Checkpointing_timer::m_name</a></div><div class="ttdeci">const std::string m_name</div><div class="ttdoc">The immutable human-readable name for this timer. It's const so no need for accessor for now.</div><div class="ttdef"><b>Definition:</b> <a href="checkpt__timer_8hpp_source.html#l00440">checkpt_timer.hpp:440</a></div></div>
<div class="ttc" id="aclassflow_1_1perf_1_1Checkpointing__timer_html_a32ed9864d46708789d7418ab637ff382"><div class="ttname"><a href="classflow_1_1perf_1_1Checkpointing__timer.html#a32ed9864d46708789d7418ab637ff382">flow::perf::Checkpointing_timer::process_cpu_clock_types</a></div><div class="ttdeci">static Clock_types_subset process_cpu_clock_types()</div><div class="ttdoc">Returns the bit-set containing only those Clock_types enabled that measure passage of processor time ...</div><div class="ttdef"><b>Definition:</b> <a href="checkpt__timer_8cpp_source.html#l00084">checkpt_timer.cpp:84</a></div></div>
<div class="ttc" id="aclassflow_1_1perf_1_1Checkpointing__timer_html_a378be385d0c3dda261c8944551280010"><div class="ttname"><a href="classflow_1_1perf_1_1Checkpointing__timer.html#a378be385d0c3dda261c8944551280010">flow::perf::Checkpointing_timer::scale</a></div><div class="ttdeci">void scale(uint64_t mult_scale, uint64_t div_scale)</div><div class="ttdoc">Called anytime after the last checkpoint(), this modifies the data collected so far to be as if every...</div><div class="ttdef"><b>Definition:</b> <a href="checkpt__timer_8cpp_source.html#l00100">checkpt_timer.cpp:100</a></div></div>
<div class="ttc" id="aclassflow_1_1perf_1_1Checkpointing__timer_html_a3b73f2812c2bf6a27ef2becc13859d73"><div class="ttname"><a href="classflow_1_1perf_1_1Checkpointing__timer.html#a3b73f2812c2bf6a27ef2becc13859d73">flow::perf::Checkpointing_timer::now</a></div><div class="ttdeci">Time_pt_set now() const</div><div class="ttdoc">Sample all currently enabled Clock_types' clocks and return those values, each of which is a time sta...</div><div class="ttdef"><b>Definition:</b> <a href="checkpt__timer_8cpp_source.html#l00241">checkpt_timer.cpp:241</a></div></div>
<div class="ttc" id="aclassflow_1_1perf_1_1Checkpointing__timer_html_a66605dd59939ddc69d7f8fde19a5ed7c"><div class="ttname"><a href="classflow_1_1perf_1_1Checkpointing__timer.html#a66605dd59939ddc69d7f8fde19a5ed7c">flow::perf::Checkpointing_timer::m_last_checkpoint_when</a></div><div class="ttdeci">Time_pt_set m_last_checkpoint_when</div><div class="ttdoc">The value of now() recorded during the last checkpoint() call; or equals m_start_when if checkpoint()...</div><div class="ttdef"><b>Definition:</b> <a href="checkpt__timer_8hpp_source.html#l00529">checkpt_timer.hpp:529</a></div></div>
<div class="ttc" id="aclassflow_1_1perf_1_1Checkpointing__timer_html_a7c799f400ceddd5ad5529fa66f026fd0"><div class="ttname"><a href="classflow_1_1perf_1_1Checkpointing__timer.html#a7c799f400ceddd5ad5529fa66f026fd0">flow::perf::Checkpointing_timer::now_cpu_lo_res_raw</a></div><div class="ttdeci">static Cpu_split_clock_durs_since_epoch now_cpu_lo_res_raw()</div><div class="ttdoc">Returns the current Cpu_split_clock time, essentially as a combo struct containing raw (integer) coun...</div><div class="ttdef"><b>Definition:</b> <a href="checkpt__timer_8cpp_source.html#l00246">checkpt_timer.cpp:246</a></div></div>
<div class="ttc" id="aclassflow_1_1perf_1_1Checkpointing__timer_html_a82e717d5b1f6df56dc70b26c7da100f3"><div class="ttname"><a href="classflow_1_1perf_1_1Checkpointing__timer.html#a82e717d5b1f6df56dc70b26c7da100f3">flow::perf::Checkpointing_timer::now_cpu_lo_res</a></div><div class="ttdeci">static Time_pt now_cpu_lo_res(const Cpu_split_clock_durs_since_epoch &amp;cpu_combo_now_raw, bool user_else_sys)</div><div class="ttdoc">Returns individual Time_pt value returnable by now() various overloads: either the user time or syste...</div><div class="ttdef"><b>Definition:</b> <a href="checkpt__timer_8cpp_source.html#l00252">checkpt_timer.cpp:252</a></div></div>
<div class="ttc" id="aclassflow_1_1perf_1_1Checkpointing__timer_html_a959a0446aa6a0b6db59e9892d8f0a699"><div class="ttname"><a href="classflow_1_1perf_1_1Checkpointing__timer.html#a959a0446aa6a0b6db59e9892d8f0a699">flow::perf::Checkpointing_timer::real_clock_types</a></div><div class="ttdeci">static Clock_types_subset real_clock_types()</div><div class="ttdoc">Returns the bit-set containing only those Clock_types enabled that measure passage of real (wall cloc...</div><div class="ttdef"><b>Definition:</b> <a href="checkpt__timer_8cpp_source.html#l00077">checkpt_timer.cpp:77</a></div></div>
<div class="ttc" id="aclassflow_1_1perf_1_1Checkpointing__timer_html_a9d064df3b46dd7e629f4d836a9803750"><div class="ttname"><a href="classflow_1_1perf_1_1Checkpointing__timer.html#a9d064df3b46dd7e629f4d836a9803750">flow::perf::Checkpointing_timer::m_checkpoints</a></div><div class="ttdeci">std::vector&lt; Checkpoint &gt; m_checkpoints</div><div class="ttdoc">The checkpoints recorded so far, in order, one per checkpoint() call.</div><div class="ttdef"><b>Definition:</b> <a href="checkpt__timer_8hpp_source.html#l00535">checkpt_timer.hpp:535</a></div></div>
<div class="ttc" id="aclassflow_1_1perf_1_1Checkpointing__timer_html_a9e6078df059d5626ab5774f0a33fbad7"><div class="ttname"><a href="classflow_1_1perf_1_1Checkpointing__timer.html#a9e6078df059d5626ab5774f0a33fbad7">flow::perf::Checkpointing_timer::checkpoint</a></div><div class="ttdeci">const Checkpoint &amp; checkpoint(std::string &amp;&amp;name_moved)</div><div class="ttdoc">Records a checkpoint, which takes a sample of all enabled Clock_types' clocks and records the corresp...</div><div class="ttdef"><b>Definition:</b> <a href="checkpt__timer_8cpp_source.html#l00272">checkpt_timer.cpp:272</a></div></div>
<div class="ttc" id="aclassflow_1_1perf_1_1Checkpointing__timer_html_aa9940d8e87883f9985ba18939f833db9"><div class="ttname"><a href="classflow_1_1perf_1_1Checkpointing__timer.html#aa9940d8e87883f9985ba18939f833db9">flow::perf::Checkpointing_timer::Checkpointing_timer</a></div><div class="ttdeci">Checkpointing_timer(log::Logger *logger_ptr, std::string &amp;&amp;name_moved, Clock_types_subset which_clocks, size_t max_n_checkpoints)</div><div class="ttdoc">Constructs a new timer and immediately begins measuring time, in that the next checkpoint() call will...</div><div class="ttdef"><b>Definition:</b> <a href="checkpt__timer_8cpp_source.html#l00029">checkpt_timer.cpp:29</a></div></div>
<div class="ttc" id="aclassflow_1_1perf_1_1Checkpointing__timer_html_aabebe01d0d5096618a8a7c2cf52320fb"><div class="ttname"><a href="classflow_1_1perf_1_1Checkpointing__timer.html#aabebe01d0d5096618a8a7c2cf52320fb">flow::perf::Checkpointing_timer::thread_cpu_clock_types</a></div><div class="ttdeci">static Clock_types_subset thread_cpu_clock_types()</div><div class="ttdoc">Returns the bit-set containing only those Clock_types enabled that measure passage of processor time ...</div><div class="ttdef"><b>Definition:</b> <a href="checkpt__timer_8cpp_source.html#l00093">checkpt_timer.cpp:93</a></div></div>
<div class="ttc" id="aclassflow_1_1perf_1_1Checkpointing__timer_html_ac16b16c3192e287ae3f08be786626f1a"><div class="ttname"><a href="classflow_1_1perf_1_1Checkpointing__timer.html#ac16b16c3192e287ae3f08be786626f1a">flow::perf::Checkpointing_timer::m_start_when</a></div><div class="ttdeci">Time_pt_set m_start_when</div><div class="ttdoc">The value of now() saved in public constructor, marking the time point when the timing began.</div><div class="ttdef"><b>Definition:</b> <a href="checkpt__timer_8hpp_source.html#l00520">checkpt_timer.hpp:520</a></div></div>
<div class="ttc" id="aclassflow_1_1perf_1_1Checkpointing__timer_html_ac5518c3fdc58f8867ca114186562575b"><div class="ttname"><a href="classflow_1_1perf_1_1Checkpointing__timer.html#ac5518c3fdc58f8867ca114186562575b">flow::perf::Checkpointing_timer::m_which_clocks</a></div><div class="ttdeci">const Clock_types_subset m_which_clocks</div><div class="ttdoc">The bit-set indexed by size_t(Clock_type::...) wherein that clock will be sampled in now() and checkp...</div><div class="ttdef"><b>Definition:</b> <a href="checkpt__timer_8hpp_source.html#l00512">checkpt_timer.hpp:512</a></div></div>
<div class="ttc" id="aclassflow_1_1perf_1_1Checkpointing__timer_html_af14cca9bf47de862b19f04a9348de234"><div class="ttname"><a href="classflow_1_1perf_1_1Checkpointing__timer.html#af14cca9bf47de862b19f04a9348de234">flow::perf::Checkpointing_timer::Cpu_split_clock_durs_since_epoch</a></div><div class="ttdeci">Cpu_split_clock::times Cpu_split_clock_durs_since_epoch</div><div class="ttdoc">Short-hand for the combo (user/kernel) durations-since-epoch tracked by Cpu_split_clock.</div><div class="ttdef"><b>Definition:</b> <a href="checkpt__timer_8hpp_source.html#l00455">checkpt_timer.hpp:455</a></div></div>
<div class="ttc" id="aclassflow_1_1perf_1_1Checkpointing__timer_html_afeb1faa0e4962dacf9b6a134191a4933"><div class="ttname"><a href="classflow_1_1perf_1_1Checkpointing__timer.html#afeb1faa0e4962dacf9b6a134191a4933">flow::perf::Checkpointing_timer::since_start</a></div><div class="ttdeci">Duration_set since_start() const</div><div class="ttdoc">Returns the duration(s) (for all enabled Clock_types) between construction and the last checkpoint() ...</div><div class="ttdef"><b>Definition:</b> <a href="checkpt__timer_8cpp_source.html#l00293">checkpt_timer.cpp:293</a></div></div>
<div class="ttc" id="alog_8hpp_html_a325fdd4b5cf0be49b37d3b7b7c29070d"><div class="ttname"><a href="log_8hpp.html#a325fdd4b5cf0be49b37d3b7b7c29070d">FLOW_LOG_INFO</a></div><div class="ttdeci">#define FLOW_LOG_INFO(ARG_stream_fragment)</div><div class="ttdoc">Logs an INFO message into flow::log::Logger *get_logger() with flow::log::Component get_log_component...</div><div class="ttdef"><b>Definition:</b> <a href="log_8hpp_source.html#l00197">log.hpp:197</a></div></div>
<div class="ttc" id="alog_8hpp_html_a6b3b2cd7ddabf90a7c6ccd104a042cc6"><div class="ttname"><a href="log_8hpp.html#a6b3b2cd7ddabf90a7c6ccd104a042cc6">FLOW_LOG_TRACE_WITHOUT_CHECKING</a></div><div class="ttdeci">#define FLOW_LOG_TRACE_WITHOUT_CHECKING(ARG_stream_fragment)</div><div class="ttdoc">Logs a TRACE message into flow::log::Logger *get_logger() with flow::log::Component get_log_component...</div><div class="ttdef"><b>Definition:</b> <a href="log_8hpp_source.html#l00354">log.hpp:354</a></div></div>
<div class="ttc" id="alog_8hpp_html_ae4b5d4fdd2eb052615620879dd74af95"><div class="ttname"><a href="log_8hpp.html#ae4b5d4fdd2eb052615620879dd74af95">FLOW_LOG_SET_CONTEXT</a></div><div class="ttdeci">#define FLOW_LOG_SET_CONTEXT(ARG_logger_ptr, ARG_component_payload)</div><div class="ttdoc">For the rest of the block within which this macro is instantiated, causes all FLOW_LOG_....</div><div class="ttdef"><b>Definition:</b> <a href="log_8hpp_source.html#l00405">log.hpp:405</a></div></div>
<div class="ttc" id="alog_8hpp_html_affcf2e4c496ce3f42adf981669c623b8"><div class="ttname"><a href="log_8hpp.html#affcf2e4c496ce3f42adf981669c623b8">FLOW_LOG_TRACE</a></div><div class="ttdeci">#define FLOW_LOG_TRACE(ARG_stream_fragment)</div><div class="ttdoc">Logs a TRACE message into flow::log::Logger *get_logger() with flow::log::Component get_log_component...</div><div class="ttdef"><b>Definition:</b> <a href="log_8hpp_source.html#l00227">log.hpp:227</a></div></div>
<div class="ttc" id="anamespaceflow_1_1log_html_a5c602384e6fe9d7642740ac2fae4ad04a3ee808b04c34bf6c110e3754de277f7b"><div class="ttname"><a href="namespaceflow_1_1log.html#a5c602384e6fe9d7642740ac2fae4ad04a3ee808b04c34bf6c110e3754de277f7b">flow::log::Sev::S_TRACE</a></div><div class="ttdeci">@ S_TRACE</div><div class="ttdoc">Message indicates any condition that may occur with great frequency (thus verbose if logged).</div></div>
<div class="ttc" id="anamespaceflow_1_1perf_html"><div class="ttname"><a href="namespaceflow_1_1perf.html">flow::perf</a></div><div class="ttdoc">Flow module containing tools for profiling and optimization.</div><div class="ttdef"><b>Definition:</b> <a href="checkpt__timer_8cpp_source.html#l00024">checkpt_timer.cpp:25</a></div></div>
<div class="ttc" id="anamespaceflow_1_1perf_html_a09ba385403a0f347f283659a6e9d971b"><div class="ttname"><a href="namespaceflow_1_1perf.html#a09ba385403a0f347f283659a6e9d971b">flow::perf::Checkpointing_timer_ptr</a></div><div class="ttdeci">boost::shared_ptr&lt; Checkpointing_timer &gt; Checkpointing_timer_ptr</div><div class="ttdoc">Short-hand for ref-counting pointer to Checkpointing_timer.</div><div class="ttdef"><b>Definition:</b> <a href="perf__fwd_8hpp_source.html#l00043">perf_fwd.hpp:43</a></div></div>
<div class="ttc" id="anamespaceflow_1_1perf_html_a38e42ae0923eb23052e3a8a1e7956456"><div class="ttname"><a href="namespaceflow_1_1perf.html#a38e42ae0923eb23052e3a8a1e7956456">flow::perf::Duration</a></div><div class="ttdeci">Fine_duration Duration</div><div class="ttdoc">Short-hand for a high-precision boost.chrono duration, formally equivalent to flow::Fine_duration.</div><div class="ttdef"><b>Definition:</b> <a href="clock__type__fwd_8hpp_source.html#l00039">clock_type_fwd.hpp:39</a></div></div>
<div class="ttc" id="anamespaceflow_1_1perf_html_a5bb3a068357516df714c4266ec5c3df4"><div class="ttname"><a href="namespaceflow_1_1perf.html#a5bb3a068357516df714c4266ec5c3df4">flow::perf::operator&lt;&lt;</a></div><div class="ttdeci">std::ostream &amp; operator&lt;&lt;(std::ostream &amp;os, const Checkpointing_timer::Checkpoint &amp;checkpoint)</div><div class="ttdoc">Prints string representation of the given Checkpoint to the given ostream.</div><div class="ttdef"><b>Definition:</b> <a href="checkpt__timer_8cpp_source.html#l00335">checkpt_timer.cpp:335</a></div></div>
<div class="ttc" id="anamespaceflow_1_1perf_html_a75b06c669e720c60621f3c68c3d34408"><div class="ttname"><a href="namespaceflow_1_1perf.html#a75b06c669e720c60621f3c68c3d34408">flow::perf::duration_rep_t</a></div><div class="ttdeci">Duration::rep duration_rep_t</div><div class="ttdoc">The raw type used in Duration to store its clock ticks.</div><div class="ttdef"><b>Definition:</b> <a href="clock__type__fwd_8hpp_source.html#l00050">clock_type_fwd.hpp:50</a></div></div>
<div class="ttc" id="anamespaceflow_1_1perf_html_aabd93a8a40158585ed149742d8937601"><div class="ttname"><a href="namespaceflow_1_1perf.html#aabd93a8a40158585ed149742d8937601">flow::perf::Clock_types_subset</a></div><div class="ttdeci">std::bitset&lt; size_t(Clock_type::S_END_SENTINEL)&gt; Clock_types_subset</div><div class="ttdoc">Short-hand for a bit-set of N bits which represents the presence or absence of each of the N possible...</div><div class="ttdef"><b>Definition:</b> <a href="clock__type__fwd_8hpp_source.html#l00164">clock_type_fwd.hpp:164</a></div></div>
<div class="ttc" id="anamespaceflow_1_1perf_html_ace5f154155a7d9d5c112c1a83aa04fb5"><div class="ttname"><a href="namespaceflow_1_1perf.html#ace5f154155a7d9d5c112c1a83aa04fb5">flow::perf::Time_pt</a></div><div class="ttdeci">Fine_time_pt Time_pt</div><div class="ttdoc">Short-hand for a high-precision boost.chrono point in time, formally equivalent to flow::Fine_time_pt...</div><div class="ttdef"><b>Definition:</b> <a href="clock__type__fwd_8hpp_source.html#l00033">clock_type_fwd.hpp:33</a></div></div>
<div class="ttc" id="anamespaceflow_1_1perf_html_ad61fb186191e4bb824d14601d11a2eb0"><div class="ttname"><a href="namespaceflow_1_1perf.html#ad61fb186191e4bb824d14601d11a2eb0">flow::perf::Clock_type</a></div><div class="ttdeci">Clock_type</div><div class="ttdoc">Clock types supported by flow::perf module facilities, perf::Checkpointing_timer in particular.</div><div class="ttdef"><b>Definition:</b> <a href="clock__type__fwd_8hpp_source.html#l00066">clock_type_fwd.hpp:67</a></div></div>
<div class="ttc" id="anamespaceflow_1_1perf_html_ad61fb186191e4bb824d14601d11a2eb0a1490431155a134162390180995550ca7"><div class="ttname"><a href="namespaceflow_1_1perf.html#ad61fb186191e4bb824d14601d11a2eb0a1490431155a134162390180995550ca7">flow::perf::Clock_type::S_CPU_SYS_LO_RES</a></div><div class="ttdeci">@ S_CPU_SYS_LO_RES</div><div class="ttdoc">Counterpart of S_CPU_USER_LO_RES, measuring processor time (kernel-level) spent by the current proces...</div></div>
<div class="ttc" id="anamespaceflow_1_1perf_html_ad61fb186191e4bb824d14601d11a2eb0a6fba12db09e5bebfaa04f6372c41c2cf"><div class="ttname"><a href="namespaceflow_1_1perf.html#ad61fb186191e4bb824d14601d11a2eb0a6fba12db09e5bebfaa04f6372c41c2cf">flow::perf::Clock_type::S_END_SENTINEL</a></div><div class="ttdeci">@ S_END_SENTINEL</div><div class="ttdoc">Final, invalid clock type; its numerical value equals the number of clocks currently supported.</div></div>
<div class="ttc" id="anamespaceflow_1_1perf_html_ad61fb186191e4bb824d14601d11a2eb0a8cbf506eda585c026dfb5b72c402d342"><div class="ttname"><a href="namespaceflow_1_1perf.html#ad61fb186191e4bb824d14601d11a2eb0a8cbf506eda585c026dfb5b72c402d342">flow::perf::Clock_type::S_REAL_HI_RES</a></div><div class="ttdeci">@ S_REAL_HI_RES</div><div class="ttdoc">Measures real time (not processor time), using the highest-resolution system clock available that gua...</div></div>
<div class="ttc" id="anamespaceflow_1_1perf_html_ad61fb186191e4bb824d14601d11a2eb0a93867c73fb6ef991268c0052153344c2"><div class="ttname"><a href="namespaceflow_1_1perf.html#ad61fb186191e4bb824d14601d11a2eb0a93867c73fb6ef991268c0052153344c2">flow::perf::Clock_type::S_CPU_THREAD_TOTAL_HI_RES</a></div><div class="ttdeci">@ S_CPU_THREAD_TOTAL_HI_RES</div><div class="ttdoc">Similar to S_CPU_TOTAL_HI_RES but applied to the calling thread as opposed to entire process.</div></div>
<div class="ttc" id="anamespaceflow_1_1perf_html_ad61fb186191e4bb824d14601d11a2eb0ac5c54159101dbdb580f0b16a9397d6f3"><div class="ttname"><a href="namespaceflow_1_1perf.html#ad61fb186191e4bb824d14601d11a2eb0ac5c54159101dbdb580f0b16a9397d6f3">flow::perf::Clock_type::S_CPU_TOTAL_HI_RES</a></div><div class="ttdeci">@ S_CPU_TOTAL_HI_RES</div><div class="ttdoc">Measures processor time (user- and kernel-level total) spent by the current process; this is the high...</div></div>
<div class="ttc" id="anamespaceflow_1_1perf_html_ad61fb186191e4bb824d14601d11a2eb0ae06b569eb44aff6a567186f4eddb12ed"><div class="ttname"><a href="namespaceflow_1_1perf.html#ad61fb186191e4bb824d14601d11a2eb0ae06b569eb44aff6a567186f4eddb12ed">flow::perf::Clock_type::S_CPU_USER_LO_RES</a></div><div class="ttdeci">@ S_CPU_USER_LO_RES</div><div class="ttdoc">Along with S_CPU_SYS_LO_RES, measures processor time (user-level) spent by the current process; this ...</div></div>
<div class="ttc" id="anamespaceflow_1_1util_html_a685b86585da2fa5186f51854e7ae1561"><div class="ttname"><a href="namespaceflow_1_1util.html#a685b86585da2fa5186f51854e7ae1561">flow::util::ostream_op_string</a></div><div class="ttdeci">std::string ostream_op_string(T const &amp;... ostream_args)</div><div class="ttdoc">Equivalent to ostream_op_to_string() but returns a new string by value instead of writing to the call...</div><div class="ttdef"><b>Definition:</b> <a href="util_2util_8hpp_source.html#l00381">util.hpp:381</a></div></div>
<div class="ttc" id="anamespaceflow_html_a3938730ab4b89daf13d027a5f620e7ce"><div class="ttname"><a href="namespaceflow.html#a3938730ab4b89daf13d027a5f620e7ce">flow::Flow_log_component</a></div><div class="ttdeci">Flow_log_component</div><div class="ttdoc">The flow::log::Component payload enumeration comprising various log components used by Flow's own int...</div><div class="ttdef"><b>Definition:</b> <a href="common_8hpp_source.html#l00637">common.hpp:638</a></div></div>
<div class="ttc" id="astructflow_1_1perf_1_1Checkpointing__timer_1_1Checkpoint_html"><div class="ttname"><a href="structflow_1_1perf_1_1Checkpointing__timer_1_1Checkpoint.html">flow::perf::Checkpointing_timer::Checkpoint</a></div><div class="ttdoc">The entirety of the information recorded with each Checkpointing_timer::checkpoint() call; it contain...</div><div class="ttdef"><b>Definition:</b> <a href="checkpt__timer_8hpp_source.html#l00203">checkpt_timer.hpp:204</a></div></div>
<div class="ttc" id="astructflow_1_1perf_1_1Checkpointing__timer_1_1Checkpoint_html_a6c0363e3e1ef330464b87363e4287758"><div class="ttname"><a href="structflow_1_1perf_1_1Checkpointing__timer_1_1Checkpoint.html#a6c0363e3e1ef330464b87363e4287758">flow::perf::Checkpointing_timer::Checkpoint::m_name</a></div><div class="ttdeci">const std::string m_name</div><div class="ttdoc">User-supplied name of the checkpoint.</div><div class="ttdef"><b>Definition:</b> <a href="checkpt__timer_8hpp_source.html#l00206">checkpt_timer.hpp:206</a></div></div>
<div class="ttc" id="astructflow_1_1perf_1_1Checkpointing__timer_1_1Checkpoint_html_aacbec1a1e5600aeac4e7ca876060552f"><div class="ttname"><a href="structflow_1_1perf_1_1Checkpointing__timer_1_1Checkpoint.html#aacbec1a1e5600aeac4e7ca876060552f">flow::perf::Checkpointing_timer::Checkpoint::m_since_last</a></div><div class="ttdeci">Duration_set m_since_last</div><div class="ttdoc">For the T.checkpoint() call that generated *this, for each enabled Clock_type: Time elapsed since eit...</div><div class="ttdef"><b>Definition:</b> <a href="checkpt__timer_8hpp_source.html#l00212">checkpt_timer.hpp:212</a></div></div>
<div class="ttc" id="astructflow_1_1perf_1_1Duration__set_html"><div class="ttname"><a href="structflow_1_1perf_1_1Duration__set.html">flow::perf::Duration_set</a></div><div class="ttdoc">Convenience wrapper around an array&lt;Duration, N&gt;, which stores a duration for each of the N possible ...</div><div class="ttdef"><b>Definition:</b> <a href="clock__type__fwd_8hpp_source.html#l00185">clock_type_fwd.hpp:186</a></div></div>
<div class="ttc" id="astructflow_1_1perf_1_1Duration__set_html_ae7d89b9e16f45dc59b27092e0496ce4f"><div class="ttname"><a href="structflow_1_1perf_1_1Duration__set.html#ae7d89b9e16f45dc59b27092e0496ce4f">flow::perf::Duration_set::m_values</a></div><div class="ttdeci">std::array&lt; Duration, size_t(Clock_type::S_END_SENTINEL)&gt; m_values</div><div class="ttdoc">The underlying data, directly readable and writable by user. NOT ZERO-INITIALIZED ON CONSTRUCTION (or...</div><div class="ttdef"><b>Definition:</b> <a href="clock__type__fwd_8hpp_source.html#l00188">clock_type_fwd.hpp:188</a></div></div>
<div class="ttc" id="astructflow_1_1perf_1_1Time__pt__set_html"><div class="ttname"><a href="structflow_1_1perf_1_1Time__pt__set.html">flow::perf::Time_pt_set</a></div><div class="ttdoc">Convenience wrapper around an array&lt;Time_pt, N&gt;, which stores a time point for each of the N possible...</div><div class="ttdef"><b>Definition:</b> <a href="clock__type__fwd_8hpp_source.html#l00195">clock_type_fwd.hpp:196</a></div></div>
<div class="ttc" id="astructflow_1_1perf_1_1Time__pt__set_html_a9867f05832f22c6aceb340c0ba697dbc"><div class="ttname"><a href="structflow_1_1perf_1_1Time__pt__set.html#a9867f05832f22c6aceb340c0ba697dbc">flow::perf::Time_pt_set::m_values</a></div><div class="ttdeci">std::array&lt; Time_pt, size_t(Clock_type::S_END_SENTINEL)&gt; m_values</div><div class="ttdoc">The underlying data, directly readable and writable by user. NOT ZERO-INITIALIZED ON CONSTRUCTION (or...</div><div class="ttdef"><b>Definition:</b> <a href="clock__type__fwd_8hpp_source.html#l00198">clock_type_fwd.hpp:198</a></div></div>
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